A) 63
B) 72
C) 81
D) 90
Correct Answer: B
Solution :
Sol. [b] |
\[1\,\times \,7\Rightarrow \,1\times 7+1=8\] |
\[2\,\times \,7\Rightarrow \,2\times 7+2=16\] |
\[3\times 7\Rightarrow 3\times 7+3=24\] |
\[4\times 7\Rightarrow 4\times 7+4=32\] |
Similarly, \[9\times 7\Rightarrow 9\times 7+9=72\] |
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