Mathematics quick practice

Question 1 of 10

A set with no elements is called

Question 2 of 10

At 5 a.m. the temperature in a town was −5 °C. By noon it rose by 10 °C and by night it fell by 11 °C. (a) What was the temperature at noon? (b) What was the temperature at night? (c) Find the difference between the noon and night temperatures.

Question 3 of 10

Solve 2(x − 11) = −34.

Question 4 of 10

Two angles on a straight line are (2x)° and 126°. Find x.

Question 5 of 10

Ama had GH₵ 480. She spent 2/5 of it on books and 3/4 of the remainder on food. (a) How much did she spend on books? (b) How much did she spend on food? (c) How much was left?

Question 6 of 10

The mean of 6 numbers is 14. 5 of them are 15, 13, 13, 20, 16. The last number is ___.

Question 7 of 10

If A = {1, 2, 3, 4} and B = {3, 4, 5}, find A ∩ B.

Question 8 of 10

In a class of 57 pupils, 17 like Mathematics, 19 like Science and 7 like both subjects. (a) Draw a Venn diagram to show this information. (b) How many like Mathematics only? (c) How many like neither subject?

Question 9 of 10

Find 12% of GH₵ 360.

Question 10 of 10

A = {2, 4, 6, 8} and B = {4, 8, 12}. Find A ∪ B.