What is the remainder when the product of 17 and 23 is divided by 5?
1
17 mod 5 is 2. 23 mod 5 is 3. The product of the remainders is 2 * 3 = 6. 6 mod 5 is 1. Alternatively, 17 * 23 = 391, and 391 / 5 = 78 with a remainder of 1.
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.
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