Question

In each of the following question a series of numbers
is given, only one number in the series is worng wrong
find out that wrong number.
15, 16, 20 , 28, 45, 70, 106.​

Answer 1

Answer: The wrong number is 28 . The correct number should be 29 . Here's how the pattern works ---

15 + 1 = 16 , 1 a square number

16 + 4 = 20 , 4 a square number

20 + 9 = 29 , 9 a square number

29 + 16 = 45 , 16 a square number

45 + 25 = 70 , 25 a square number

70 + 36 = 106 , 36 a square number