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📐 Maths, Years 9 and 10

Years 9 to 10 · Read up first

10 questions. Get 8 right to earn 10 minutes. All 10 right = +5 bonus. They start easy and get harder as you go, so treat the first few as a warm-up. Every one you miss comes back with the answer and why.

1. Expand: 3(x + 4)

3x + 73x + 123x + 4x + 12

2. Expand: 4(2x + 3)

8x + 76x + 78x + 38x + 12

3. Which gradient describes a line that slopes downhill from left to right?

A negative gradientAn undefined gradientA positive gradientA gradient of zero

4. Solve: 2x + 5 = 17

x = 11x = 44x = 6x = 8.5

5. A scatter graph shows points that rise from bottom left to top right. What kind of correlation is this?

Positive correlationNegative correlationNo correlationPerfect correlation

6. Two box plots compare test scores for class A and class B. Class A's box is entirely to the right of class B's box. What does this tell you?

The two classes had the same medianClass A generally scored higher than class BClass A's scores were more spread outClass A had more students than class B

7. What is the total surface area of a cube with side length 3 cm?

27 cm^29 cm^254 cm^218 cm^2

8. Expand: (x + 2)(x + 3)

x^2 + 5x + 6x^2 + 6x^2 + 6x + 6x^2 + 5x + 5

9. Find the gradient of the line joining (2, 5) and (4, 1).

-22-44

10. Solve simultaneously: 3x + y = 11 and x + y = 5.

x = 4, y = 1x = 2, y = 3x = 3, y = 2x = 3, y = 5

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