CBSE Class 11-science Answered
900 can be written as 22x32x52=900
Now the way to select a proper divisor would mean that we have to include all the powers for each factor including zero.
Hence, for 2 we can have 20 , 21 , 22
which gives us 3 options.
Similarly for 3, we can have options from 30 , 31 , 32
And also for 5, we will also have 3 options.
Hence, the total number of divisors=3x3x3=27
This would however include the case of the number itself and 1.
Hence, we must subtract 2 divisors from this to get 27-2=25.