Numbers Questions

What is the digit in unit's place of the product 51 x 52 x 53 ...... 59?

Of the 3 numbers whose average is 64, the first number is 1/3 times the sum of other 2. The first number is

A number is greater than 58 times its reciprocal by 3/4. What is the number?

In ΔABC measure of angle B is 90°. If cosecA = 13/12, and AB = 10cm, then what is the length (in cm) of side AC?

What is the sum of the first 13 terms of an arithmetic progression if the first term is -10 and last term is 26?

What is the sum of the first 13 terms of an arithmetic progression if the first term is -10 and last term is 26?

The sum of a non-zero number and thrice its reciprocal is 52/7. Find the number.

A number is greater than twice its reciprocal by 31/4. Find the number.