Intelligence Test
Comprehension - Numbers
MCQ
Choose the correct number to replace the question mark: 7, 15, 31, 63, 127, ?
A
245
B
254
C
255
D
260
Explanation
Each forward number is (backward number × 2) + 1. (7 × 2) + 1 = 15;

 (15 × 2) + 1 = 31;

 (31 × 2) + 1 = 63;

 (63 × 2) + 1 = 127. 

Therefore, (127 × 2) + 1 = 254 + 1 = 255.
Correct 0 Wrong 0