Answer: 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.
