Puzzle for adults with jokes, intelligent, funny, complex, logical, with a catch

Below are the logical tasks for adult ru with answers. Also here you will find intellectual jokes and ridiculous riddles. All of these adult puzzles ask a question, the answer to which may be a trick. Such a logical quiz is designed for running a game for children with pictures. It is always necessary to provide an answer to the riddle, because not everyone can solve complex puzzles.

There are a handful (for example, 20, the number is not so important) of irregularly shaped emeralds (unfinished stones) and a bowl of water. If you drop all the emeralds into the bowl, then the water level in the bowl will rise to the edges and if the smallest specks of dust get in, at least a drop will overflow. As soon as using the hands and head (brain) to find out which of the emeralds is larger in volume? No topping up is provided. (We divide the emeralds in pairs and will check each pair for the largest volume of stone (one of two). Set aside the largest ones. After all the pairs have been checked and the largest have been selected, we will divide them into pairs and check again in pairs. And so on until the 2 most voluminous emeralds remain, of which again the largest is selected, which will be the largest. The selection of one of the largest of the two can be easily done if you first lower one stone into the bowl with your hand and lower your hand there , so that the water rises to the limit of the edges, but does not pour out. There will be a trace on the hand from the border of the water, which will not have time to dry out until the stone is pulled out and put a new one. If, after lowering the second stone, the hand immersed in water until the water rises to the edges will be higher boundaries, then the second stone is smaller, if lower, then the second larger).
How much money can be obtained if a table, buoy and rags are put into operation? (If you make the letters of these words in the right order, you can make the expressions "five hundred rubles" and "one hundred and five rubles").
Two neighbors-summer residents gathered to build a bridge across the stream, dividing their summer cottages. The distance from the stream to the house of each summer resident is different, and the house of one summer resident is located slightly downstream relative to the house of the other. How to build a bridge over a stream so that it stands at the same distance from both houses? (The problem is solved using simple geometric calculations. First we measure the distance (in a straight line) between the houses and divide it in half. For clarity, you can use a long rope by pulling it between the houses. In the middle part of the rope, make a mark and set the perpendicular from it (to the rope ) in the direction of the stream. The point of intersection of the perpendicular with the stream will indicate the desired location for the construction of the bridge).
In the turning workshop of the repair plant, the turner is turning bushings from bronze blanks. For the manufacture of each bronze sleeve, one blank is required. In order to save material, bronze shavings collected after the manufacture of bushings are used for remelting and casting of new similar blanks. How many sleeves can be made in this way from 36 initially identical workpieces, if it is known that the chips generated from the manufacture of six sleeves are enough for the subsequent smelting of one additional workpiece? (In total, it is possible to make 43 bushings.Of which 36 bushings from the originally available blanks; 6 bushings from the blanks after the first remelting of the chips and another 1 sleeve from the blanks obtained after the second remelting of the chips (from six additionally obtained blanks).
What are two numbers whose number of digits is equal to the number of letters that make up the name of each of these numbers. (“One hundred” - 100; “one million” - 1,000,000).
When my father was 31 years old, I was 8 years old, and now my father is twice my age. How old am I now? (23 years. The difference between the years of a father and a son is 23 years; therefore, a son must have 23 years to have a father twice his age).
Lena lives on the fourth floor, while going up to her home, she goes up the stairs of 60 steps. Julia lives in the same entrance on the second floor. How many steps does Julia walk up to her home on the second floor? (In order to climb to the 4th floor, Lena needs to go through three flights of stairs (60 steps). To climb to the 2nd floor, Yulia needs to go through only one flight of stairs, that is, 20 steps).
How can the diameter of a thin wire be measured with maximum accuracy, having only a measuring ruler and a pencil? (It is necessary to tightly, turn to coil, wind the wire on a pencil (round, without edges), thereby making at least ten turns (the larger, the more accurate the measurement); then use a ruler to measure the length from the first to the last turn in millimeters, and the resulting figure divided by the number of turns made).
Do you think coniferous and deciduous forests are equally noisy? (The noise of the wind in the forest varies depending on the tree species. Pines and spruces break the wind into vortices, following one after the other very often; this produces a whistling sound with a very high tone. There is constantly noise in the deciduous forest, because the wide surface of the leaves the wind breaks into small streams. The leaves tremble, rub against each other, rustle. In the spring, when the leaves are young and tender, their rustle is soft; it coarsens in the fall, when the leaves become more rigid).
Two people are walking nearby, one of them is the father of the son of the other. How can this be? (This is the father and mother of the child).
Put your pocket watch on the table, step back a few steps and listen to their ticking. If the room is quiet enough, then you will hear that your clock goes as if intermittently: then it ticks for a short time, then it stops for a few seconds, then it starts to walk again, etc. How can we explain such an uneven clock? ) Mysterious breaks in the ticking of the clock are explained by fatigue of hearing. Our hearing becomes dull for a few seconds, and during these intervals we do not hear ticks. After a short time, fatigue passes, and the former sensitivity is restored, then we again hear the clock. Then comes fatigue again, etc.).
Greenland is a huge island covered in snow and ice. Why did the person who discovered this island call it Greenland, i.e. Green Earth? (Greenland was discovered by the Scandinavian jarl Eric Red in about 982. He sought to encourage people to settle there and therefore called the country Greenland, since this name could attract them (in English greenland - "green land").
Changing the wheel of his car, a man dropped all four nuts of his fastening into the sewer grate, from where it was impossible to get them. He had already decided that he was stuck here, but a boy passing by prompted him a very sensible thought, which allowed him to go on. What was his idea? (The boy suggested unscrewing one nut from each of the three wheels and securing the fourth wheel with them. Having done this, the person was able to get to the nearest garage with the wheels firmly fixed).
Everyone knows that there is a way to put a model ship in a bottle. But how to make a whole ripe cucumber appear in the bottle without damaging the bottle? (At the time when the ovary of a cucumber appears on the stem, it is necessary to place it without breaking the stem in the bottle through the neck, and in this form leave the cucumber to ripen.As you know, cucumbers ripen very quickly, and in a few days the cucumber will grow inside the bottle).
A sheet of squared paper was bent in half six times. Two holes were drilled through the middle of this folded sheet. How many holes can be counted on the sheet after it is deployed to its original position? (Each bending of the sheet will double the number of holes. Therefore, bending the sheet six times and drilling two holes in it, we get 128 holes in the unfolded sheet as a result).
On ordinary cup scales are: on one cup - a cobblestone weighing exactly 2 kg, on the other - an iron weight, weighing 2 kg as well. The scales were carefully lowered under water. Are the cups in balance? (Each body, if immersed in water, becomes easier: it "loses" in its weight as much as the water displaced by it. A cobblestone weighing 2 kg takes up a larger volume than a 2 kilogram iron weight, because the material of the stone lighter than iron. Therefore, cobblestones will displace a larger volume of water than a weight, and according to the law of Archimedes, it will lose more weight in the water than a weight. Therefore, the balance under the water will tilt toward the weight).
Suppose you need to tumble down a concrete wall 20 meters long, 3 meters high and weighing 3 tons. How do you complete this task if you have absolutely no tools at your disposal? (Such a wall, with such a weight and given dimensions, will have a thickness of only about 2 centimeters and can easily be rolled by hand).
A man is jumping from a chair. In his hands he holds the scales, on the cup of which lies a load of 10 kg. What division will the arrow of the scales stand during the fall? (At zero).
2 bricks were laid on a smooth board - one flat and one on the edge. Bricks weigh the same. Which brick will slip first if you tilt the board? (The bricks will begin to slide at the same time. After all, both bricks press on the board with the same force, which means that the friction forces that they have to overcome are the same. The specific friction forces per square centimeter of the contact area of the bricks with the board, of course, are not equal. But the total friction forces acting on the bricks equal to the product of the specific friction force and the contact surface area will be the same).
All of us have repeatedly heard the murmur of a stream. Why do you think he murmurs? (The stream murmurs because a stream of water, with a small drop, captures air particles and immerses them in water, causing bubbles to form. The burr of the stream is explained by the bursting of these bubbles).
The man tossed and turned in bed for a long time at night and couldn’t fall asleep ... Then he picked up the phone, dialed someone’s number, listened to a few long beeps - hung up and quietly fell asleep. Question: why couldn’t he fall asleep before? (A neighbor snored loudly behind the wall, who later woke up from a phone call).
The balloon is free and motionless in the air. A man got out of his gondola and began to climb up the cable. Where will the balloon move: up or down? (The balloon should go down, since, climbing up the rope, a person pushes it with the ball in the opposite direction. Here the same thing happens as when a person walks along the bottom of the boat: the boat moves backwards).
A steel gangway was lowered from the side of the ship. The lower 4 steps of the ladder are immersed in water. Each step has a thickness of 5 cm; the distance between two adjacent steps is 30 cm. The tide began, at which the water level began to rise at a speed of 40 cm per hour. How many steps do you think will be under water in 2 hours? (In two hours, under the water there will be the same 4 steps, because at high tide the ladder rises with the ship).
In a forest dispensary in a clearing, two athletes play table tennis. After another strong blow with a racket, a tennis ball flew away and rolled into a steel pipe, vertically dug deeply (several meters) into the ground. The ball was at the very bottom of the pipe (several meters from the surface of the earth). In athletes, it was the only ball.Please tell me how they can pull out a tennis ball without much effort, without resorting to digging up such a long pipe? (They need to pour water into the pipe to the edges, then the ball itself will float to the surface).
Can you establish by what principle this sequence is built: 8 2 9 0 1 5 7 3 4 6. (All numbers follow each other in accordance with the alphabetical order of their names (eight, two, nine, zero, etc. )
What do you think your friends and acquaintances use more often than you, but this is your property? (Your name. It is friends and acquaintances who use your name when contacting you, but you use it yourself much less often).
If you have it, then you have the full part. If you share this with someone, will it completely disappear? (This is a secret. If you share it with someone, then this will no longer be a secret and it automatically disappears by itself).
Until this is measured, it is not known. However, if it constantly flies, then many people often do not like it. What is it? (This is time. Until a person looks at the clock, it is not known. And people often say with regret that time flies).
Imagine that in your closet for socks there are: 4 white socks, 8 black, 3 brown and 5 gray. What is the minimum number of socks you need to pull out of the closet without looking to be sure that you will get at least one pair of identical socks. (Five socks. Since the number of types of socks is 4, the pulled out fifth will always form a pair with one of four).
If you call her name, it will immediately disappear. What it is? (Silence (or silence). If you start pronouncing its name (name), then there will be no silence or silence).
You saw him where he had never been and could not be. But you see him there very often. Who is he and where could he not be, but do you often see him there? (You see yourself (your reflection) in the mirror. Such an option is also possible - this is the TV presenter "on the TV", where he does not fit in any way).
Continue the following sequence of letters: C O N D I F M ... (Letter “A”. Here, the sequence of first letters in the name of the months of the year starting in September is used: September, October, November, December, January, February, March. Therefore, the following the letter will be “A” - April).
What constantly walks, but at the same time, in most cases, staying in one place? (This is a clock. In a conversation, we sometimes use the expression "the clock goes ...".
What do you think, if a woman is cold as a fish, then a man should be patient, like ...? (Fisherman).
You need to find out the pattern by which the numbers are in this sequence and indicate the number that should continue this sequence: 2 1 9 7 6 4 0 8 ... (Number 3. The decision is connected with the alphabetical order of the names of the numbers, not only by the first letter, but the second (if the second are the same, then the third).
Alexander has his own pet shop selling birds. If he places one bird in each cage, then one bird does not have enough cages. If Alexander places two birds in each cage, then one cage will remain free. What do you think, how many cages and birds are in Alexander’s pet store? (Alexander has four birds and three cages in a pet store).
Imagine you have a large kvass barrel. In addition, you have two empty bottles of 3 and 5 liters. How to measure exactly one liter of kvass with these bottles? (First we fill a 3-liter bottle with kvass from the barrel, then pour all 3 liters from the 3-liter bottle into the 5-liter bottle. Then, again, pour the kvass from the barrel into the 3-liter bottle. Then pour the kvass from it into a five-liter bottle until it is full, and as a result, exactly 3 liters of kvass will remain in a 3-liter bottle).
Alexander weighs half as much as Dmitry, and Nikolai weighs 3 times as much as Alexander. Try to determine how much each of them weighs, if all together they weigh 360 kilograms? (Nikolai = 180kg, Dmitry = 120kg, Alexander = 60kg. Solution: let Alexander’s weight = x (x), then Dmitry’s weight = 2x, and Nikolay’s weight = 3x. Therefore, we get the equation: (x + 2x + 3x) = 360kg. Equivalent: 6x = 360kg, from where x = (360kg: 6) = 60kg.After that, the weight of each of them is easily calculated).
If Jack does not drink at work, then for some reason all his employees begin to think that he is a poor worker and a loafer. Why do you think so? (Jack works as an alcohol taster).
It is black when you receive it. When you use it, it is red. After use, it becomes white or gray. What it is? (This is charcoal. In the store it is sold in bags and there it is black, and when you light it (for example, in a barbecue), it is red. And when the charcoal completely burns out, it turns white or gray, i.e. ash).

In this article, you read all the funny puzzles. Each riddle on logic (5 and 5) will allow you to expand your horizons.