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ReviewersPH Free Practice Tests

What is a Prime Number?

  1. A natural number greater than 1 that is not a product of two smaller natural numbers.
  2. A positive integer greater than 1 that can only be divided by itself and 1 without leaving a remainder.
  3. A prime number is a whole number greater than 1 whose only factors are 1 and itself.
  4. A number that cannot be divided by any other number except itself and the number.
  5. A prime number is a positive integer that has exactly two positive divisors.

Examples of a prime number

2,3,5,7,11,13,17,19,21,...


How many prime numbers are less than 100?

25


What is the lowest prime number?

2

What is the lowest even prime number?

2

What is the lowest odd prime number?

3