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Que: If x and y are different prime numbers greater than 20 but less than 30, what is the value of x + y?

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by Max@Math Revolution » Sat May 08, 2021 8:27 pm

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B

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D

E

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Que: If x and y are different prime numbers greater than 20 but less than 30, what is the value of x + y?

A. 23
B. 29
C. 50
D. 52
E. 56
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Re: Que: If x and y are different prime numbers greater than 20 but less than 30, what is the value of x + y?

by Max@Math Revolution » Sun May 09, 2021 11:59 pm
Solution: Prime number: An integer that has two positive factors = only 1 and itself => ex) 2, 3, 5, 7…

We have to find the value of x + y

=>If x and y are different prime numbers greater than 20 but less than 30

=> Prime numbers between 20 and 30: 23 and 29 => ∴ x + y = 23 + 29 = 52 .

Therefore, D is the correct answer.

Answer D
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