# Mind Puzzles For Adults To Challenge Their IQ | MindYourLogic Puzzles

1.There are two ducks in front of a duck, two ducks behind a duck and a duck in the middle. How many ducks are there?

Answer: Three. Two ducks are in front of the last duck; the first duck has two ducks behind; one duck is between the other two.

2. Five people were eating apples, A finished before B, but behind C. D finished before E, but behind B. What was the finishing order?

Answer: CABDE. Putting the first three in order, A finished in front of B but behind C, so CAB. Then, we know D finished before B, so CABD. We know E finished after D, so CABDE.

3. Jack is looking at Anne. Anne is looking at George. Jack is married, George is not, and we don’t know if Anne is married. Is a married person looking at an unmarried person?

Answer: Yes. If Anne is married, then she is married and looking at George, who is unmarried. If Anne is unmarried, then Jack, who is married, is looking at her. Either way, the statement is correct.

4.The day before two days after the day before tomorrow is Saturday. What day is it today?

Answer: Friday. The “day before tomorrow” is today; “the day before two days after” is really one day after. So if “one day after today is Saturday,” then it must be Friday.

5. If five cats can catch five mice in five minutes, how long will it take one cat to catch one mouse?

Answer: Five minutes. Using the information we know, it would take one cat 25 minutes to catch all five mice (5x5=25). Then working backward and dividing 25 by five, we get five minutes for one cat to catch each mouse.

6.I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What color was the bear?

Answer:White, since the only place you can do that is the North Pole and polar bears are the only kind of bears that live there.

7. A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

Answer:The river was frozen

8. In my hand I have two coins that are newly minted. Together, they total 30 cents. One isn’t a nickel. What are the coins?

Answer:A quarter and a nickel

9. Four cars come to a four-way stop, all coming from a different direction. They can't decide who got there first, so they all go forward at the same time. They do not crash into each other, but all four cars go. How is this possible?

10. Find a number less than 100 that is increased by one-fifth of its value when its digits are reversed.

Answer:45 (1/5 of 45 = 9, 9 + 45 = 54)

11.Two boxers are in a match scheduled for 12 rounds. (Pure boxing only. There are no kicking or takedowns). One of the boxers gets knocked out after only six rounds, yet no man throws a punch. How is this possible?

Answer:Both the boxers were female

12.Which creature walks on four legs in the morning, two legs in the afternoon, and three legs in the evening?

Answer:Man. He crawls on all fours as a baby, then walks on two feet as an adult, and then walks with a cane as an old man.

13. The water level in a reservoir is low, but doubles every day. It takes 60 days to fill the reservoir. How long does it take for the reservoir to become half full?

Answer:59 days. If the water level doubles every day, the reservoir on any given day was half the size the day prior. If the reservoir is full on day 60, that means it was half full on day 59, not on day 30.

14. Which word logically comes next in this sequence? Spots, tops, pots, opts…

Answer:Stop. All the words are anagrams of each other.

15. You’re standing in a hallway with three light switches on the wall, each of which turns on a different lamp inside a closed room. You can’t see inside the room, and you can’t open the door except to enter the room. You can enter the room only once, and when you do, all the lamps must be turned off. How can you tell which switch turns on which lamp?

Answer:Turn on the right switch and leave it on for two minutes. After two minutes, turn on the middle switch and leave it on for one minute. When that minute is up, turn off both switches and enter the room. One light bulb will be hot (1st switch) and one will be warm (2nd switch). The cold bulb will correspond to the switch you didn’t turn on.

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Lipika Lajwani 2023-10-30

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