Q1:

In how many ways can 156 be written as a product of 2 factors.

Q2:

Find number of divisors of 8820

Q3:

Find the number of odd divisiors of 8820 ?

Q4:

Find the total number of even factors of 180.

Q5:

Find the number of zero in the end of 50! ?

Q6:

Find the number of co-primes of 36, less than 36

Q7:

Find the sum of all co-primes of 36 ?

Q8:

Find the sum of all the factors of 90.

Q9:

In how many ways 144 can be written as product of two numbers, if both the numbers are unique?

Q10:

How many factors of 108 are multiples of 3 but not 9?

Q11:

Find the highest power of 7 that divides 57! completely?

Q12:

How many factors of 196 are perfect square ?

Q13:

Find the value of $\sqrt{20+\sqrt{20+\sqrt{20+\mathrm{...}}}}\infty$

Q14:

Find the sum of even factors of 2⁴ × 3³.

Q15:

Find the average of the factors of 120.