Question

express 80 and 140 as the product of prime factors and also find their HCF ​

Answer 1

Answer:

"When you will get the factors of 80 you will get 2 * 2 * 2 * 2 * 5.

These numbers are the prime numbers that make them the prime factor of the 80.  

but anyways the answer is 20

It is known as prime because the number will not be divided by any other number except themselves or 1.

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Answer 2

80 = 2×2×2×2×5

140 = 7×2×2×5

Common terms are = 2×2×5

Hence HCF = 2×2×5 = 20