| Direction: What should come in place of the question mark (?) in the following number series? | |||||
| 17 | 18 | 22 | 31 | 47 | ? |
A) 72
B) 77
C) 83
D) 68
E) 65
Correct Answer: A
Solution :
The pattern of the number series is: \[17+{{\text{1}}^{2}}=17+1=18\] \[18+22=18+4=22\] \[22+{{3}^{2}}=22+9=31\] \[31+42=31+16=47\] \[47+{{5}^{2}}=47+25=72\]
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