The numbers $49,29,9,40,22,15,53,33,13,47$ are grouped in pairs so that the sum of each pair is the same. Which number is paired with 15 ?
(A) 33
(B) 40
(C) 47
(D) 49
(E) 53
The numbers $49,29,9,40,22,15,53,33,13,47$ are grouped in pairs so that the sum of each pair is the same. Which number is paired with 15 ?
(A) 33
(B) 40
(C) 47
(D) 49
(E) 53

## Solution

If we arrange the numbers in ascending order we would have: $9,13,15,22,29,33,40,47,49,53$. If the sum of each pair is equal they would be paired as: $9 \leftrightarrow 53,13 \leftrightarrow 49,15 \leftrightarrow 47,22 \leftrightarrow 40$, $29 \leftrightarrow 33$.

ANSWER: (C)