Checkpoint
Four questions. Try each one.
Do one Kaprekar round on 4321. What do you get?
Collatz process. The number is 12. What comes next?
Take turns adding 1, 2 or 3. First to say 22 wins. Which number is a winning number?
A number is more than 50. Its digits add to 9. It is less than 60. Which fits?
0 of 4 answered