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Cornerstone Jan 1 - 7 25 questions
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Monday 27 February 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 30 + 37

    Answer: 30 + 37 = 67
  2. 2. Algebra

    Solve: 9x = 135

    Answer: x = 15
  3. 3. Geometry

    Find the area of a circle with radius 3cm

    Answer: 28.27cm²
  4. 4. Ratio

    Simplify: 8:12:12

    Answer: 2:3:3
  5. 5. Statistics

    Find the mean of: 15, 11, 10, 14

    Answer: 12.5

Tuesday 28 February 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 42 + 49

    Answer: 42 + 49 = 91
  2. 2. Algebra

    Solve: 7x = 63

    Answer: x = 9
  3. 3. Geometry

    Opposite = 14cm, hypotenuse = 28cm. Find the angle

    Answer: 30° (approximately)
  4. 4. Ratio

    Simplify: 6:18:18

    Answer: 1:3:3
  5. 5. Statistics

    Find the range of: 17, 26, 23, 39, 13

    Answer: 26

Wednesday 1 March 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 26 + 58

    Answer: 26 + 58 = 84
  2. 2. Algebra

    Solve: 7x - 10 = 2x + 35

    Answer: x = 9
  3. 3. Geometry

    Calculate the area of a circle with diameter 23cm

    Answer: 415.48cm²
  4. 4. Ratio

    Find 21% of 238

    Answer: 49.98
  5. 5. Statistics

    Calculate the mean of: 9, 14, 43, 36, 15, 26, 10, 11

    Answer: 20.5

Thursday 2 March 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 68 + 46

    Answer: 1712
  2. 2. Algebra

    Solve: 7x = 63

    Answer: x = 9
  3. 3. Geometry

    Opposite = 12cm, hypotenuse = 17cm. Find the angle

    Answer: 45° (approximately)
  4. 4. Ratio

    Simplify: 6:18:6

    Answer: 1:3:1
  5. 5. Statistics

    Calculate the mean of: 19, 43, 17, 47, 21, 24, 21

    Answer: 27.4

Friday 3 March 2023

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 85 + 86

    Answer: 85 + 86 = 171
  2. 2. Algebra

    Factorise: 14x + 16

    Answer: 2(7x + 8)
  3. 3. Geometry

    Calculate the area of a circle with diameter 9cm

    Answer: 63.62cm²
  4. 4. Ratio

    Simplify: 10:6:8

    Answer: 5:3:4
  5. 5. Statistics

    Find the mean of: 10, 20, 20

    Answer: 16.666666666667