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Question
Write a set of clues for a secret number of your own. Then give it to a friend to guess your secret number.
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Solution
A set of clues to find the secret number is as follows:
- It is larger than half of 100.
- It is more than 6 tens and less than 7 tens.
- The tens digit is two less than the one's digit.
- The sum of the digits is 14.
- Find the secret number.
- It is smaller than half of 100.
- It is more than 3 tens and less than 4 tens.
- The digit sum is 10.
- Find the secret number.
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| Take the smallest number | 3 |
| Add 8 to it | +8 |
| = | 11 |
| Multiply it by 9 | ×9 |
| Total | 99 |
Now you choose any 3 × 3 boxes from a calendar and find the total in the same way.
Take the first two odd numbers. Now add them, see what you get. Now, at every step, add the next odd number.|
How far can you go on?
Number Surprises
