Q. 74.7( 29 Votes )

Explain why 3 × 5 × 7 + 7 is a composite number.

Thinking Process

A number which has more than two factors is known as a composite number.

Answer :

According to the definition of Composite numbers, any number with more than 2 factors is said to be composite.


Here, 3 × 5 × 7 + 7 = 105 + 7 = 112


The factors of 112 are : 2 × 2 × 2 × 2 × 7 = 24 × 7.


Since it has more than 2 factors, Hence, it is a composite number.


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