the numbers 52, 32, 12, 43, 25, 18, 56, 36, 16, 50 are grouped in pairs in such a way that the sum of each pair is the same. the number paired with 18 is

Answer 1

n = the number paired with 18

As there are 10 terms the terms after pairing will be 5 ( half of the before ).

Total sum of the terms =

52 + 32 + 12 + 43 + 25 + 18 + 56 + 36 +16 + 50 = 340

The sum of two number that is paired = x

x + x + x + x = 340

5 x = 340

x = 340 / 5 = 68

68 = 18 + n

n = 50

Answer 2

How it happened as 68=18+n

Answer 3

X+X+X+X=340 then
5X=340 how it happened

Answer 4

Total sum = 340 of all terms
The sum of two number = x
X + X + X + X = 340
5X = 340
X = 340/5 = 68
68 = 18 + n
n = 50