Problem Solving & Word Problems: Hard Test 4

15 questions · 15 minutes

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I add 5 to a number, multiply the result by 4 and then subtract 12. The answer is 40. What was my number?
Five pens and three rulers cost £4.90 altogether. A ruler costs 80p. How much does one pen cost?
The mean of six numbers is 25. Two of the numbers, 20 and 30, are removed. What is the mean of the four numbers that are left?
A number increased by 25% becomes 90. What was the original number?
A father is 32 years older than his son. In 8 years' time the father will be 3 times as old as his son. How old is the son now?

Read the question twice before writing anything. The second reading is where the crucial detail usually surfaces.
Underline the numbers and circle what is actually being asked. Many lost marks come from answering a question that was not set.