Question

1st Transformation & Rule

1st Transformation: Adding 5 to a number.
1st Rule: If you add 5 to a number, the result is 10. What is the number?

a) 15
b) 5
c) 10
d) 20

Answer 1

The question involves reversing an arithmetic addition to find the original number. By subtracting the number added from the resultant, we find that the original number is 5.

Step-by-step explanation:

The student asks about a simple arithmetic transformation involving adding 5 to a number. To find out what the original number is, given that the result after addition is 10, we need to reverse the transformation. Considering the first rule mentioned, we subtract 5 from the result to get the original number:

• Original number + 5 = 10
• Original number = 10 - 5
• Original number = 5

Therefore, the original number before adding 5 to it is 5, which corresponds to option b).