Question

the sum of 3 consecutive odd naturals numbers is 69.find the prime number.

Answer 1

let the no. be x, x+2 , x +4
sum = x + x+2 +x+4 =69
3x +6 = 69
3x = 63
x = 21 = first no.
second no. = 21+2= 23
third no. = 21+4= 25

Answer 2

mid - term = 69 ÷ 3 = 23. 

∴ The numbers are 21, 23 and 25. 

23 is the prime number. 

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