wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

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


Open in App
Solution

We have,
a=3×5×7+7=7(3×5+1)=7×16=24×7

We know that the only factor of a prime number apart from 1 is the number itself. Since this number has multiple prime factors, the number is composite.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Primes and Composite Numbers
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon