Question

Match the number of factors for following numbers.

• A. 8
• B. 3
• C. 5

Answer 1

Given: $16,25\&30$
$16=1\times 16=2\times 8=4\times 4$
Factors are $1,16,2,4\&8$
Number of factors $=5$

$25=1\times 25=5\times 5$
Factors are $1,25\&5$
Number of factors $=3$

$30=1\times 30=2\times 15=6\times 5=3\times 10$
Factors are $1,30,2,15,6,5,3\&10$
Number of factors $=8$

$or$
$16=2^4\times 1^1$
Number of factors $=4+1=5$

$25=5^2\times 1^1$
Number of factors $=2+1=3$

$30=2^1\times 3^1\times 5^1$
Number of factors $=(1+1)(1+1)(1+1)=2\times 2\times 2=8$