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

[Max@Math Revolution]

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

[Max@Math Revolution]

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