Workkeys Math Practice Test

Question: 1 / 400

If a number is decreased by 15 and the result is 20, what was the original number?

25

30

35

To determine the original number, you can set up a simple equation based on the information given in the question. The problem states that if a number is decreased by 15, the result is 20. This can be represented mathematically as:

Original Number - 15 = 20.

To find the original number, you add 15 to both sides of the equation:

Original Number = 20 + 15,

Original Number = 35.

This shows that the original number was indeed 35, confirming the correct answer. The reasoning process involves understanding basic algebra where adjustments to an equation can help isolate the variable representing the unknown number.

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