Puzzles - Number puzzles

Answer

:

89

Explanation

:

Working from top to bottom, numbers represent the sequence of Square Numbers, from 144 to 289, with the first digit left out.

Answer

:

8

Explanation

:

In each row, the middle value equals the sum of the left and right hand values, adding 2 for the top row, 4 for the middle row, and 6 for the bottom row.

Answer

:

38

Explanation

:

Starting at the top, add 4 to the first number to get the second, then add 5, 6, 7 etc.