1. What is four-fifths as a decimal?
0.8
2. What is the volume of a cube which has edges measuring 5cm?
125cm³ (centimetres cubed)
3. How many months are there in twelve years?
144
4. What is the next number in the series: 2, 9, 30, 93, …?
282 (multiply the previous number by three and then add three)
5. If y=10x − 1 and the value of x is 10, what is the value of y?
99
6. If a recipe requires 400 grams of potatoes for four people, how many kilograms would be required for twelve people?
1.2kg (Note difference in measurement – question given in grams and answer requires conversion to kilograms)
7. A dress has a thirty percent discount applied and is on sale for £63. What was the original price of the dress before the reduction?
£90
8. Geoff thinks of a number. He deducts five from it and then divides the result by three. His answer is 25. What number did he start with?
80
9. What is nine-tenths of 2000?
1800
10. 3 − 7 × 4 = ?
-25 (minus 25 – multiplication should be completed before subtraction)