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Five quick questions to see how RiseToExcel works: choose an answer and see straight away whether it is right, with a short explanation. Nothing is saved: no account, no sign-in, and nothing is kept on this device after you leave the page.

Simplify 3x + 4 − x + 2.

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Answer: A (2x + 6). Collect like terms: 3x − x = 2x and 4 + 2 = 6, so the answer is 2x + 6.

What is the slope of the line through the points (0, 1) and (2, 7)?

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Answer: B (3). Slope = (7 − 1) ÷ (2 − 0) = 6 ÷ 2 = 3.

Which point lies on the line y = 2x − 1?

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Answer: B ((1, 1)). Put x = 1 into the equation: y = 2(1) − 1 = 1, so (1, 1) is on the line. The other points do not fit.

The perimeter of a square is 36 cm. What is its area?

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Answer: C (81 cm²). Each side is 36 ÷ 4 = 9 cm, so the area is 9 × 9 = 81 cm².

What is the mean of 4, 7, 9 and 12?

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Answer: B (8). Add the numbers: 4 + 7 + 9 + 12 = 32. Divide by how many there are: 32 ÷ 4 = 8.