Keystones Bedrock — May 14 - 20 | Maths Vault

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Bedrock May 14 - 20 25 questions

Monday 18 May 2026

Keystones #138 · Five questions · Open this day only

1. Number

Calculate: ¹⁄₁₂ + ⁵⁄₁₂

Answer: ¹⁄₂
2. Algebra

Simplify: 9x + 4x

Answer: 13x
3. Geometry

Opposite = 12cm, hypotenuse = 13.9cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 20:12

Answer: 5:3
5. Statistics

Find the mean of: 10, 8, 6, 11, 11

Answer: 9.2

Tuesday 19 May 2026

Keystones #139 · Five questions · Open this day only

1. Number

600000

Answer: 6 × 10⁵
2. Algebra

Find the midpoint of (5, 8) and (11, 13)

Answer: (8, 10.5)
3. Geometry

Opposite = 14cm, hypotenuse = 19.8cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 9:15

Answer: 3:5
5. Statistics

Find the mean of: 13, 4, 4, 4, 4

Answer: 5.8

Wednesday 20 May 2026

Keystones #140 · Five questions · Open this day only

1. Number

Calculate: 10 + 24

Answer: 10 + 24 = 34
2. Algebra

Find the next term: 9, 11, 13, 15, ...

Answer: 17
3. Geometry

Opposite = 9cm, hypotenuse = 18cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Simplify the ratio 14:4

Answer: 7:2
5. Statistics

Find the range of: 15, 37, 11, 25, 23

Answer: 26

Thursday 21 May 2026

Keystones #141 · Five questions · Open this day only

1. Number

Calculate: 55 + 49

Answer: 55 + 49 = 104
2. Algebra

Factorise: 8x + 6

Answer: 2(4x + 3)
3. Geometry

Find the area of a circle with radius 8cm

Answer: 201.06cm²
4. Ratio

Simplify the ratio 32:24

Answer: 4:3
5. Statistics

Find the mean of: 9, 2, 19, 11

Answer: 10.25

Friday 22 May 2026

Keystones #142 · Five questions · Open this day only

1. Number

Calculate: 37 + 14

Answer: 37 + 14 = 51
2. Algebra

Simplify: 7x + 2x

Answer: 9x
3. Geometry

Find the area of a circle with radius 7cm

Answer: 153.94cm²
4. Ratio

Simplify the ratio 9:6

Answer: 3:2
5. Statistics

Find the mean of: 15, 17, 8, 11, 16

Answer: 13.4