Fill in the missing number 3, 15, 35, 63, 99, 143, 195, …?

M4maths Previous Puzzles

11 Nov 2021 Missing Number

Fill in the missing number
3, 15, 35, 63, 99, 143, 195, …?

OPtion

1. 240
2. 225
3. 235
4. 242
5. 255
6. 266
7. 256
8. 278
9. 245
10. None of the above

Solution

2^2 - 1 = 3
4^2 – 1 = 15
6^2 – 1 = 35
8^2 – 1 = 63
10^2 – 1 = 99
12^2 - 1 = 143
14^2 – 1 = 195
16^2 – 1 = 255

Correct Option: 5 Best Solution (1)