A) 8
B) 9
C) 13
D) 10
Correct Answer: B
Solution :
\[36\,49\to {{6}^{2}}\,{{7}^{2}}\to 6+7=13\] \[64\,\,81\to {{8}^{2}}\,{{9}^{2}}\to 8+9=17\] Similarly, \[25\,\,16\to {{5}^{2}}\,{{4}^{2}}\to 5+4=\underline{\mathbf{9}}\]You need to login to perform this action.
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