A pair of shoes and a pair of socks together cost $110. The shoes cost $100 more than the socks. How much do the socks cost?
$5
Let S be the cost of socks. The shoes cost S + 100. Together: S + (S + 100) = 110, so 2S + 100 = 110, giving 2S = 10, which means S = 5.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Medium. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
More math riddles
What single digit, when multiplied by itself, yields a product that ends in that exact same digit, while also being greater than 1?
Ava counts pies in a pattern: 3, 5, 7, 9. How many pies come next?
I have no edges, no corners, and no straight lines. If you place me immediately to the right of any whole number, you multiply its value by ten, but if you multiply that whole number by me, nothing remains. What number am I?
I am an odd three-digit number. All of my digits are different. My first digit is one-third of my last digit, and my middle digit is the sum of the other two. What number am I?
Spelled out in standard English words, which positive integer has all of its letters in strictly alphabetical order?
Ten mathematicians attend a seminar. At the conclusion of the event, every person shakes hands with every other person in the room exactly once. How many total handshakes occur?

