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Name that Prime!

You can use divisibility rules to prove whether a number is a prime number or not. Try this activity to see how well you know your divisibility rules and name the prime numbers.

Goal:

Goal:

Is 14 a prime number?

  1. Yes
  2. No

14 is divisible by 14, 7, 2 and 1. Therefore 14 is not prime.

14 is divisible by 14, 7, 2 and 1. Therefore 14 is not prime.

Is 51 a prime number?

  1. Yes
  2. No

51 is divisible by 51, 17, 3, and 1. Therefore 51 is not prime.

51 is divisible by 51, 17, 3, and 1. Therefore 51 is not prime.

Is 31 a prime number?

  1. Yes
  2. No

31 is divisible by 31 and 1. Therefore it is prime.

31 is divisible by 31 and 1. Therefore it is prime.

Is 2 a prime number?

  1. Yes
  2. No

2 is divisible by 2 and 1. Therefore it is prime.

2 is divisible by 2 and 1. Therefore it is prime.

Is 77 a prime number?

  1. Yes
  2. No

77 is divisible by 77, 11, 7 and 1. Therefore it is not prime.

77 is divisible by 77, 11, 7 and 1. Therefore it is not prime.

Summary

Questions answered correctly:

Questions answered incorrectly: