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Question

Which one of the given numbers is completely divisible by 45?
Options:
A .  None of these
B .  165642
C .  202860
D .  112330
Answer: Option C

Answer : Option C

Explanation :

If a number is divisible by two co-prime numbers, then the number is divisible by their
product also.
If a number is divisible by more than two pairwise co-prime numbers,
then the number is divisible by their product also.
before proceeding
further.
112330 is divisible by 5 but not divisible by 9 => 112330 is not divisible by 45
202860 is divisible by 5 and 9 => 202860 is divisible by 45
165642 is not divisible by 5 and 9 => 165642 is not divisible by 45
Hence, 202860 is the answer


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