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
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
X+X+X+X=340 then
5X=340 how it happened
How it happened as 68=18+n
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
To find out which number is paired with 18, we need to determine the sum of each pair.
Let's go through the numbers and look for pairs that have the same sum. Since we are given that every pair has the same sum, we can pair the numbers in any order.
Looking at the list of numbers, we can pair them in the following way:
52 + 32 = 84
12 + 43 = 55
25 + 18 = 43
56 + 36 = 92
16 + 50 = 66
Comparing the sums of each pair, we observe that the sum of the pair 25 + 18 is 43.
Therefore, the number paired with 18 is 25.