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How many composite numbers are in between 50 and 100 inclusive of 50 and 100?

Published in Number Theory 1 min read

There are 39 composite numbers in between 50 and 100, inclusive of 50 and 100.

Understanding Composite Numbers

A composite number is a positive integer that has at least one divisor other than 1 and itself. In simpler terms, it's a number that can be formed by multiplying two smaller positive integers. For example, 6 is a composite number because it can be expressed as 2 × 3. Numbers that are not composite (and are greater than 1) are called prime numbers. The number 1 is neither prime nor composite.

Listing Composite Numbers from 50 to 100

To determine the exact count, we identify all the numbers within the specified range that fit the definition of a composite number. The numbers between 50 and 100 (inclusive) that are composite are:

  • 51, 52, 54, 55, 56, 57, 58, 60
  • 62, 63, 64, 65, 66, 68, 69, 70
  • 72, 74, 75, 76, 77, 78, 80, 81
  • 82, 84, 85, 86, 87, 88, 90, 91
  • 92, 93, 94, 95, 96, 98, 99

Detailed Breakdown and Count

Let's organize these numbers to clearly see their quantity:

Range Composite Numbers Count
50-59 51, 52, 54, 55, 56, 57, 58, 60 8
60-69 62, 63, 64, 65, 66, 68, 69, 70 8
70-79 72, 74, 75, 76, 77, 78, 80 7
80-89 81, 82, 84, 85, 86, 87, 88, 90 8
90-100 91, 92, 93, 94, 95, 96, 98, 99 8
Total 39

As confirmed by the reference, there are indeed 39 composite numbers between 50 and 100, inclusive. Each of these numbers has factors other than 1 and itself. For example, 51 = 3 × 17, 91 = 7 × 13, and 99 = 9 × 11.

For more information, you can refer to resources like this Brainly answer on composite numbers between 50 and 100.