Question

Which of the following is a natural number?
1. √78
2. √ 16
3. 73.52 repeating
4. π
please help

Answer 1

Remember that natural numbers are positive integers only (1, 2, 3 and so on). Only one of the four answer choices is a natural number. You can eliminate 73.52 repeating and pi as neither of these are integers (they are decimals). Between square root 78 and square root 16 which ends up being an integer after simplifying?

If you’re still stuck try plugging in sqrt(78) and sqrt(16) into a calculator to see which one gives you an integer result.