A) 190
B) 221
C) 236
D) 255
Correct Answer: D
Solution :
\[7\times 2+1=15\Rightarrow 15\times 2+1=31\] Similarly,\[31\times 2+1=63\Rightarrow 63\times 2+1=1270\] \[127\times 2+1=\]You need to login to perform this action.
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