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.
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.