| Direction: What will come in place of question mark (?) in the given number series? |
A) 128
B) 178
C) 148
D) 168
E) 164
Correct Answer: D
Solution :
The series is \[\text{+}{{\text{6}}^{\text{2}}}\text{, +}{{\text{7}}^{\text{2}}}\text{, +}{{\text{8}}^{\text{2}}}\text{, +}{{\text{9}}^{\text{2}}}\text{, }...\] ie\[\text{19+}{{\text{6}}^{\text{2}}}\text{=55, 55+}{{\text{7}}^{2}}\text{=104}\], \[\text{104+}{{\text{8}}^{\text{2}}}\text{=168, 168+}{{\text{9}}^{\text{2}}}\text{=249}\], \[249+{{10}^{2}}=349,...\]
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