Question

Find the largest possible product of two prime numbers given that their sum is 20.

Answer 1

We have to find the largest possible product of two numbers given that their sum is 20.

solution : a prime number is a number which is not divisible by any number except 1 and itself.

for example, 2, 3, 5, 7, 11 , 13 ...

here we have to find largest possible product.

if we assume a and b are required prime numbers

so , a + b = 20

now let a = 13 (a prime number)

so b = 20 - 13 = 7 (a prime number too)

now we see product of prime numbers = 13 × 7 = 91

Therefore largest possible product is 91.

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Answer 2

Answer:

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