Question

Find the GCD of 30, 49 and 63.

• A. 1

Answer 1

The correct option is A 1
Factorizing the three numbers:
$30=1\times 2\times 3\times 5$
$49=1\times 7\times 7$
$63=1\times 3\times 3\times 7$
Common factor(s) is/are: 1
Hence GCD (30, 49, 63) = 1