Change pack
Cornerstone Jul 21 - 27 25 questions
PDF (questions) PDF (answers)

Monday 21 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄8 + 3⁄7

    Answer: 45⁄56
  2. 2. Algebra

    Solve: 5x - 20 = 35

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio

    Divide 210 in the ratio 2:2:1

    Answer: 84, 84 and 42
  5. 5. Statistics

    Calculate the mean of: 25, 34, 31, 36, 9, 39, 21, 27

    Answer: 27.8

Tuesday 22 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄12 + 5⁄12

    Answer: 7⁄12
  2. 2. Algebra

    Solve: 3x - 18 = -6

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 6cm

    Answer: 7.81cm
  4. 4. Ratio

    Divide 91 in the ratio 3:3:1

    Answer: 39, 39 and 13
  5. 5. Statistics

    Calculate the mean of: 20, 34, 31, 18, 30, 48

    Answer: 30.2

Wednesday 23 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 1⁄4

    Answer: 7⁄12
  2. 2. Algebra

    Solve: 6x + 15 = 57

    Answer: x = 7
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio

    Divide 120 in the ratio 1:3:1

    Answer: 24, 72 and 24
  5. 5. Statistics

    Find the mean of: 11, 18, 20

    Answer: 16.333333333333

Thursday 24 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄3 + 6⁄7

    Answer: 25⁄21
  2. 2. Algebra

    Solve: 4x + 7 = 43

    Answer: x = 9
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio

    Share 42 in the ratio 3:4

    Answer: 18 and 24
  5. 5. Statistics

    Calculate the mean of: 15, 46, 29, 14, 26, 36, 16

    Answer: 26

Friday 25 July 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra

    Solve: 3x - 20 = 7

    Answer: x = 9
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 4cm

    Answer: 8.94cm
  4. 4. Ratio

    Share 24 in the ratio 1:2

    Answer: 8 and 16
  5. 5. Statistics

    Find the mean of: 16, 18, 6, 5

    Answer: 11.25