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Find no. of divisors of 1980. How many of them are multiple of 11.

Find no. of divisors of 1980. How many of them are multiple of 11.
 

Grade:11

1 Answers

Sourabh Singh IIT Patna
askIITians Faculty 2104 Points
7 years ago
Hii
You can go for prime factorisation and you can write 1980 as 11 *2*2*3*3*5 .

In this you need multiple of 11 so the answer will be 3*3*2 = 18 factors.

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