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.