# Puzzles and Brain Teasers

Brain teasers and puzzles help you to train your brain. So go ahead, take our Brain Teaser. And don't take a peek at the answer until you have tried really hard.## Brain Teasers and Puzzles

B C D ? F H ? K L M N ? Q

G, J and P

5 6 9 15 ? 40

Cut the bottom half of roman XII.

Stop imagining.

3 3 5 4 4 ? 5

3

Number of letters in one, two, three, four, five, six, seven and so on.

99 92 86 ? 77

81

99 - 7 = 92

92 - 6 = 86

86 - 5 = 81

81 - 4 = 77

64

Let the marks in Geography be G and History be H.

Eq 1: G + H = 160

Eq 2: G/3 = H/2

By the problem:

G = 160 - H

Therefore, putting the value of G in Eq 2:

(160 - H)/3 = H/2

or, 320 - 2H = 3H

or, 3H + 2H = 320

or, 5H = 320

or, H = 64

8 15 44 175 874 ?

5243

9 x 1 - 1 = 8

8 x 2 - 1 = 15

15 x 3 - 1 = 44

44 x 4 - 1 = 175

175 x 5 - 1 = 874

874 x 6 - 1 = 5243

$46%5

The woman is Sam's sister.

Sam's mother's brother's only brother-in-law is Sam's father. Hence, the daughter of Sam's father, is Sam's sister.

1 4 6 9 11 14 16 19 ?

21

Each number is the sum of the previous number and "2" or "3" alternatively. Please see below:

1 + 3 = 4

4 + 2 = 6

6 + 3 = 9

9 + 2 = 11

11 + 3 = 14

14 + 2 = 16

16 + 3 = 19

19 + 2 = 21

The whole alphabet.

Write S in front of IX to make it SIX.

(It is not possible to partially fill a bucket and determine the amount of water in it)

Fill the 3 liter bucket and then pour the entire water into the 4 liter bucket.

The 4 liter bucket should still be able to hold 1 liter more.

Now again fill the 3 liter bucket and empty it into the 4 liter bucket till it becomes full.

Since the 4 liter bucket had space for only 1 more liter, the 3 liter bucket would now have 2 liters of water in it.

2 hours

You take the first pill at 10:00am

The second pill at 10:30am

The third pill at 11:00am

The fourth pill at 11:30am

The fifth pill at 12 noon

1 1 2 3 5 8 13 ?

21

Each number is the sum of the previous two digits.

96

20 years after Tony's birth would mean 11 years from now (since Tony is already 9 years old).

Hence, 11 years from now, Tony's cousin would be 12 + 11 = 23 years old.

Similarly, 11 years from now, Tony's sister would be 14 + 11 = 25 years old.

Hence sum of the ages of Tony's cousin and Tony's sister would be 23 + 25 = 48.

And double of that sum would be: 48 x 2 = 96.

18 24 28 30

**?**

30

2 x 9 = 18

3 x 8 = 24

4 x 7 = 28

5 x 6 = 30

6 x 5 = 30

387420489 (i.e. 9^{9})

8 2 6

4

**?**0

6 0 6

4

8-2 = 6

4-4 = 0

6-0 = 6

Sam will be 16 years and his teacher will be 62 years.

J ? M A M J J A S O N D

F

The letters are the first letter of each of the twelve months. The second month is February.

Nancy

888+88+8+8+8 = 1000

3.7

Add a decimal between 3 and 7.

Z O T T F F S S __

E

The sequence is Zero, One, Two, Three, Four, Five, Six, Seven, Eight

2 3 3 5 10 13 39 43 __

172

Add 1 to get the next number then multiply with 1 for the next one. Similarly add 2 and then again multiply with 2 and so on.

P O I U Y T ___

R

101 99 102 98 103 97 ___ ___

104, 96