11 | 10 | 22 | 63 | ? | 1275 |
A) 256
B) 251
C) 274
D) 286
E) 266
Correct Answer: A
Solution :
The series is \[\times 1-1,\text{ }\times 2+2,\text{ }\times 3-3,\text{ }\times 4+4,\text{ }\times 5-5,\text{ }\times 6+6,...\] ie \[\text{11}\times \text{1-1=10, 10}\times \text{2+2= 22,}\] \[22\times 3-3=63,\text{ }63\times 4+4=\mathbf{256},\] \[\text{256}\times \text{5-5=1275, }...\]You need to login to perform this action.
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