Question 79

If a, b, c and d are 4 whole numbers such that a + b + c = d where a, b, d are all odd numbers, then find c.

Solution

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let a, b , c be any odd numbers

let a = 3

b = 7 

c =13

a + b + c = d

3 + 7 + 13 = 23

it means d is also odd

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