A) 30
B) 12
C) 42
D) 6
Correct Answer: B
Solution :
\[{{15}^{30}}\times {{10}^{12}},\] number of zeroes in any product depends upon the presence of number of 5's and number of 2's in it \[{{15}^{30}}\times {{10}^{12}}={{3}^{30}}\times {{5}^{30}}\times {{2}^{12}}\times {{5}^{12}}={{2}^{12}}\times {{3}^{30}}\times {{5}^{42}}\] The product has 12, 2's and 42 5's. So, the number of zeroes is 12. (5's alone cannot give 10, same number of 2's are required)You need to login to perform this action.
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