A) 610
B) 660
C) 670
D) 690
Correct Answer: D
Solution :
We have: \[({{1}^{2}}+{{5}^{2}}+{{4}^{2}}+{{3}^{2}})10=510;({{3}^{2}}+{{4}^{2}}+{{6}^{2}}+{{2}^{2}})10=650\]So, missing number \[=\left( {{\text{1}}^{\text{2}}}+{{\text{2}}^{\text{2}}}+{{\text{8}}^{\text{2}}}+{{0}^{\text{2}}} \right)\text{1}0=\text{69}\times \text{1}0=\text{69}0.\]
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