Keystones Bedrock — Jan 1 - 7 | Maths Vault

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Bedrock Jan 1 - 7 25 questions

Monday 9 June 2025

Keystones #1 · Five questions · Open this day only

1. Number

Calculate: ⁴⁄₆ + ¹⁄₆

Answer: ⁵⁄₆
2. Algebra

Simplify: 6x + 6x

Answer: 12x
3. Geometry

Convert 3m to cm

Answer: 300cm
4. Ratio

Simplify the ratio 20:12

Answer: 5:3
5. Statistics

Find the mean of: 19, 2, 4, 16, 12

Answer: 10.6

Tuesday 10 June 2025

Keystones #1 · Five questions · Open this day only

1. Number

Simplify: 5⁵ × 5⁵

Answer: 5¹⁰
2. Algebra

Factorise: 30x + 18

Answer: 6(5x + 3)
3. Geometry

Opposite = 7cm, hypotenuse = 8.cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 9:15

Answer: 3:5
5. Statistics

What is the probability of rolling a 4 on a fair die?

Answer: ¹⁄₆

Wednesday 11 June 2025

Keystones #1 · Five questions · Open this day only

1. Number

Calculate: 22 + 26

Answer: 22 + 26 = 48
2. Algebra

Simplify: 3x + 6x

Answer: 9x
3. Geometry

Opposite = 12cm, hypotenuse = 24cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Calculate 25% of 77

Answer: 19.25
5. Statistics

Find the mean of: 4, 18, 2, 11

Answer: 8.75

Thursday 12 June 2025

Keystones #1 · Five questions · Open this day only

1. Number

Calculate: -1 + 9

Answer: 8
2. Algebra

Simplify: 7x + 4x

Answer: 11x
3. Geometry

Opposite = 11cm, hypotenuse = 15.6cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 20:28

Answer: 5:7
5. Statistics

Find the mean of: 20, 5, 6

Answer: 10.333333333333

Friday 13 June 2025

Keystones #1 · Five questions · Open this day only

1. Number

Calculate: ⁴⁄₇ + ¹⁄₇

Answer: ⁵⁄₇
2. Algebra

Solve: x + 5 = 12

Answer: x = 7
3. Geometry

Opposite = 7cm, hypotenuse = 9.9cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 14:16

Answer: 7:8
5. Statistics

Find the mean of: 13, 15, 9, 10, 4

Answer: 10.2