Direction: What will come in place of the question mark (?) in the following question? |
A) 18.9
B) 4.4
C) 5.9
D) 13.4
E) 15.6
Correct Answer: C
Solution :
\[{{21}^{?}}\times {{21}^{6.5}}={{21}^{12.4}}\] \[\Rightarrow \]\[{{21}^{?+}}^{6.5}={{21}^{12.4}}\] \[\Rightarrow \]\[?+6.5=12.4\] \[\Rightarrow \]\[?=12.4-6.5=5.9\]You need to login to perform this action.
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