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What is the correct answer?

4

1939392 * 625

A. 1212120010

B. 1212120000

C. 1212120011

D. 12121210102n

Correct Answer :

B. 1212120000


Trick: when multiplying with
5n
then put n zeros to the right of multiplicand and divide the number with
2n
So using this we can solve this question in much less
time.
1939392×54=1939392000016=1212120000

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