find the H. CF using product of primes. 1) 24,30,40

2 is the Highest Common Factor y

Step-by-step explanation: This seems like a trick question. But

Primes of 24: 2,2,2,3

Primes of 30: 2,3,5

Primes of 40: 2,2,2,5

If the question was about 30 and 40, you would take the 2 and 5 they have in common, and get 2*5=10

If it were about 24 and 40, you would take the 2*2*2 they have in common and have 8 as HCF.

For 24 and 30, it would be the 2*3=6

To find the HCF (aka GCF, greatest common factor) you use the prime as many times as they are used in common for the numbers you are factoring.

answer:

c. the third graph