GATE Aptitude

Question

Look at this series: 8, 6, 9, 23, 87, ... What number should come next?

A. 128 B. 226 C. 324 D. 429

Comments

D) 429 ??

Answer 1

$8\\ 8\times1-2=6\\ 6 \times2-3=9\\ 9 \times 3 - 4=23\\ 23 \times 4-5=87\\ 87 \times 5-6=429$

Hence, Option(D)429 is the correct choice.

Answer 2

8

8*1-2=6

6*2-3=9

9*3-4=23

23*4-5=87

87*5-6=429

option d is correct