Quiz on The Use of Letters in Place of Numbers (Mathematics)

1. If unknown number is a what is obtained by subtracting 15 from it?

2. If unknown number is x what is obtained by subtracting 5 from it?

3. If unknown number is x what is obtained by subtracting it from 5?

4. If unknown number is x what is four times of it?

5. If unknown number is x what is the product of 4 and it?

6. If unknown number is x what is the product of 1 and it?

7. If unknown number is x how many berries are given at 10 each to some children?