Number Puzzles 3 [With Answers]

Puzzle 1: Find the odd one out: level, civic, madam, eye, mouth

Answer: Mouth.

Explanation: All the words except "mouth" are palindromes (reads the same backward and forward).

Puzzle 2: Find the missing number:

6   13   25   51   101  ?

Answer: 203

Explanation: 6 x 2 + 1 = 13

13 x 2 - 1 = 25

25 x 2 + 1 = 51

51 x 2 - 1 = 101

101 x 2 + 1 = 203

Puzzle 3: Fill in the sequence:

1   5   9   15   ?

Answer: 21

Explanation: Position of the vowels a e i o u.

Puzzle 4: Complete the sequence:

49   61   51   63   53   65   55   ?

Answer: 67

Explanation: Alternate numbers increase by 2. 49 become 51 then 53 and so on. Similarly, 61 becomes 63 and then 65.