Riddle: What number, when added separately, to 100 and 164 can make each a perfect square?
Answer: The answer is 125. 125+100=225 and 125+164=289. The square root of 225 is
15 and the square root of 289 is
17.
Source: https://www.riddles.com/index.php/341
Perfect Squares by Anonymous Riddle
