Track quiz
Show on a big screenNine ideas, nine checks. The table comes first.
| Move | How it goes |
|---|---|
| Rearrange digits | Same digits, new order, new number. |
| Biggest and smallest | Biggest digit first for biggest. Smallest digit that is not 0 first for smallest. |
| Palindromes | Reads the same both ways. Reverse and add to reach one. |
| Supercells | Bigger than every neighbour it has. |
| Estimate | Round the real numbers, then add. |
| Number puzzles | Each clue removes numbers that fail it. |
| 6174 | Biggest minus smallest. Repeat. Four digits that are not all the same end at 6174. |
| Collatz | Even: halve. Odd: times 3, add 1. Repeat to reach 1. |
| Number games | Work backwards. Winning numbers are 4 apart. |
The digits of 3816 are rearranged to make 6813. What is true?
Digits 5, 0, 8, 2. Which digit goes first in the smallest number?
Which of these numbers is a palindrome?
A number is a supercell when it is bigger than which neighbours?
You add ₹342 and ₹279 by rounding to the nearest hundred first. What do you get?
Clue: the number is more than 50. Digits add to 7. Which fits?
Start with 2012. What is the first Kaprekar round?
Collatz process. The number is 7. What comes next?
Reach 22 by adding 1, 2 or 3. You go first. What do you say first?
Chapter 3 of your NCERT book is Number Play. It plays the games you just played.
Next: Data Handling and Presentation. Turn answers into a picture.
Reveal every answer to finish this lesson.