100+ Brain teasers with answers for kids and adults

Brainteasers with Answers - "Challenge your brain and improve your problem-solving skills with our collection of brainteasers. From logic puzzles to wordplay, our brainteasers will keep you entertained and engaged for hours. Whether you're a student looking to boost your grades or an adult looking to keep your mind sharp, our brainteasers have something for everyone. Test your mental aptitude and see just how clever you are with our challenging and fun collection of brainteasers."

The Chicken and Egg-Brain teaser

62. Riddles
Which came first, the chicken or the egg?

    • The egg. Evolutionarily, the first egg that contained the genetic mutation to become a chicken was laid by a bird that was not quite a chicken, making the egg the precursor.

Which exit do you pick- Brain Teasers

63. Riddles
You're escaping a labyrinth and there are three exits. Exit A leads to an inferno. Exit B leads to an assassin. Exit C leads to a lion that hasn't eaten in 3 years. Which exit do you pick? 
    • Answer: Exit C. If a lion hasn't eaten in 3 years, it has definitely starved to death.

What letter comes next-Brain Teasers

64. Riddles
What letter comes next in the following sequence. D R M F S L T_
    • Answer: D, each letter represents one note in the diatonic musical scale: Do, Re, Mi, Fa, Sol, La, Ti, Do

Two boxers are in a match scheduled for 12 round-Brain Teasers

66. Riddles
Two boxers are in a match scheduled for 12 rounds. (Pure boxing only - no kicking, UFC takedowns, or anything else). One of the boxers gets knocked out after only six rounds, yet no man throws a punch. How is this possible?
    • Answer: Both boxers are female.

The Hourglass Puzzle-Brain teaser

67. Riddles
You have two hourglasses: one measures 7 minutes and the other measures 4 minutes. How can you measure exactly 9 minutes?

    • 1. Start both hourglasses at the same time.
2. When the 4-minute hourglass runs out, flip it immediately.
3. When the 7-minute hourglass runs out, flip it immediately.
4. When the 4-minute hourglass runs out again (at 8 minutes), there is 1 minute of sand left in the 7-minute hourglass.
5. Let that 1 minute pass. You're now measured exactly 9 minutes.

The Two Door Puzzle-Brain teaser

68. Riddles
You are standing in front of two doors. One leads to freedom, and the other leads to death. Two guards are standing, one in front of each door. One always tells the truth, and the other always lies, but you don't know which one is which. You can ask only one question to one of the guards to figure out which door leads to freedom. What do you ask?

    • Ask either guard, "If I were to ask the other guard which door leads to freedom, what would they say?" Then, choose the opposite door.

The Three Switches-Brain teaser

69. Riddles
You have three switches outside a room. Each switch controls one of the three bulbs inside the room. All the switches are in the "off" position, and you can't see the bulbs from the outside. How can you figure out which switch controls which bulb if you can only enter the room once?

    • 1. Turn on the first switch and leave it on for a few minutes.
2. Turn it off and immediately turn on the second switch.
3. Enter the room:
   - The bulb that is on is controlled by the second switch.
   - The bulb that is warm but off is controlled by the first switch.
   - The bulb that is cold and off is controlled by the third switch.

What do you throw out-Brain Teasers

71. Riddles
What do you throw out when you want to use it, but take in when you don't want to use it?
    • Answer: An anchor

Guess next 3 letters- Brain Teasers

72. Riddles
Guess the next three letters in the series GTNTL.
    • Answer: I, T, S. The complete sequence is the first letter of every word in the sentence.

Monkey Squirrel Bird Racing-Brain Teasers

73. Riddles
A monkey, a squirrel, and a bird are racing to the top of a coconut tree. Who will get the banana first: the monkey, the squirrel, or the bird?
    • Answer: None of them, because you can't get a banana from a coconut tree.

Sundial and timepiece- Brain Teasers

74. Riddles
A sundial has the fewest moving parts of any timepiece. Which has the most?
    • Answer: An hourglass, with thousands of grains of sand

Man and river-Brain Teasers

75. Riddles
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