Question

Give four ways to get from 9 to 21 without repeating any numbers.

Answer 1

There are several creative ways to create a sum of 21 from the number 9. Examples provided are scenarios of simple addition and combination of subtraction and addition to achieve the targeted sum.

Step-by-step explanation:

The exercise requires us to find four distinct ways to reach a sum of 21 from the number 9, using numerical values only once. Here are four possible ways:

1. Add by 12: 9 + 12
2. Subtract by -1, then add by 13: 9 - 1 + 13
3. Subtract by -2, then add by 14: 9 - 2 + 14
4. Subtract by -3, then add by 15: 9 - 3 + 15

Learn more about Addition and Subtraction