Number enthusiasts may be looking to the new year with a touch of melancholy. Another perfect square like 2025 (45 2 = 2,025) won’t occur again until 2116 (46 2 = 2,116). The year 2027 will be a prime ...

Find a Mystery Math Mistake. Build number towers. Put the towers in order from 1 to 10. Count birds to tell if Dotson made a Mystery Math Mistake when representing the number of birds using a 10-frame ...