Numbers Questions

Which one of the following is an irrational number?

What is the reflection of the point (6, -3) in the line y = 2?

Divide 20 into two parts such that the sum of the square of the parts is 232. What is the value of the two parts?

What will be the next set of numbers in the series? (2,3), (3,5), (5,7), (7,11), (11,13), ___

What least number must be subtracted from 518, so that the sum is completely divisible by 13?

What should be the missing digit so that the number 275_476 becomes exactly divisible by 11?

What is the least number that when divided by 63 and 105 leaves remainder 4 in each case?

If the Arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is