| Direction: What will come in place of question mark (?) in the given number series? |
| 15 6.4 ? 8.304 14.8864 31.7728 |
A) 623
B) 5.92
C) 4.92
D) 3.72
E) 5.62
Correct Answer: B
Solution :
The series is \[\times 0.4+0.4\times 0.8+0.8,\times 1.2+1.2,\times 1.6+1.6,.....\], ie \[15\times 0.4+0.4=6.4\] \[6.4\times 0.8+0.8=5.92\] \[5.92\times 1.2+1.2=8.304\] \[8.304\times 1.6+1.6=14.8864\] \[14.8864\times 2+2=31.7728\]
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