If z + (1/z) = 2 then find z105

What will be the greatest common divisor (GCD) of (x² - 12x + 35) and (x² - 9x + 14).

Find the least number of four digits which is exactly divisible by 6, 8 and 16?

The least number which is exactly divisible by 15, 25 and 30 is 

The LCM of two natural numbers is 15 times their HCF. If the product of given two numbers is 13,500, then find the LCM of the numbers.

The ratio of two number is 6 : 5 and their HCF is 15. So find and their LCM?

If total number of factors of 3,150 is 'x', then find the value of (x - 6) (x + 3).

What is the highest common factor of 120 and 1800?

Three numbers a, b and c are co-prime to each other such that ab = 78 and bc = 65. Find the value of (a + b + c).

If the product of two numbers is 350 and their HCF is 10, then find the LCM of the given two numbers.

Find the HCF of 240, 280 and 560.