Q1. Find the value of √20+√20+√20 + ...
Ans - 5
Q2. Find the average of the factors of 120.
Ans - 22.5
Q3. In how many ways can 156 be written as a product of 2 factors.
Ans - 6
Q4. How many factors of 108 are multiples of 3 but not 9?
Ans - 3
Q5. Find the number of odd divisiors of 8820 ?
Ans - 18
Q6. Find the sum of even factors of 24 × 33.
Ans - 1200
Q7. Find the highest power of 7 that divides 57! completely?
Ans - 9
Q8. Find the number of co-primes of 36, less than 36
Ans - 12
Q9. Find the sum of all the factors of 90.
Ans - 234
Q10. Find number of divisors of 8820
Ans - 54
Q11. Find the number of zero in the end of 50! ?
Ans - 12
Q12. Find the number of zero in the end of 50! ?
Ans - 4
Q13. In how many ways 144 can be written as product of two numbers, if both the numbers are unique?
Ans - 7
Q14. Find the sum of all co-primes of 36 ?
Ans - 216
Q15. Find the total number of even factors of 180
Ans - 12
