What is the square root of 81?

What is 25% of 200?

Which number is even?

Which number is a multiple of 3?

Which is a prime number?

What is the value of π (pi) approximately?

What comes next? 1, 3, 5, 7, ?

Which number is a perfect square?

What is the value of (5² - 3²)?

What is the sum of first 10 natural numbers?