Number system (IX) set -4

What is the value of √49?

Which of the following is a rational number?

What is the result of 15 ÷ (3 + 2)?

Which of these numbers is an integer?

What is the value of 2^3?

Which of the following sets contains only irrational numbers?

What is the least common multiple (LCM) of 4 and 6?

Which number is not a prime number?

If x = 5, what is the value of 3x + 4?

Which of the following represents a repeating decimal?