Change pack
Cornerstone May 25 - 31 25 questions
PDF (questions) PDF (answers)

Monday 25 May 2026

Keystones #145 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄4 + 4⁄7

    Answer: 37⁄28
  2. 2. Algebra

    Solve: 7x + 14 = 56

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 10cm

    Answer: 11.18cm
  4. 4. Ratio

    Divide 112 in the ratio 3:2:3

    Answer: 42, 28 and 42
  5. 5. Statistics

    Calculate the mean of: 48, 37, 41, 28, 12, 41, 36

    Answer: 34.7

Tuesday 26 May 2026

Keystones #146 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra

    Solve: 3x + 3 = 30

    Answer: x = 9
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Divide 84 in the ratio 2:4:1

    Answer: 24, 48 and 12
  5. 5. Statistics

    Calculate the mean of: 11, 15, 23, 12, 14, 43, 38, 47

    Answer: 25.4

Wednesday 27 May 2026

Keystones #147 · Five questions · Open this day only

  1. 1. Number

    Add: 6⁄7 + 3⁄5

    Answer: 51⁄35
  2. 2. Algebra

    Solve: 3x - 16 = 14

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 9cm

    Answer: 14.21cm
  4. 4. Ratio

    Divide 80 in the ratio 3:1:4

    Answer: 30, 10 and 40
  5. 5. Statistics

    Find the mean of: 8, 12, 20, 19, 8

    Answer: 13.4

Thursday 28 May 2026

Keystones #148 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄5 + 2⁄7

    Answer: 17⁄35
  2. 2. Algebra

    Solve: 7x - 8 = 20

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 9cm

    Answer: 12.73cm
  4. 4. Ratio

    Divide 297 in the ratio 3:4:4

    Answer: 81, 108 and 108
  5. 5. Statistics

    Find the mean of: 12, 5, 19

    Answer: 12

Friday 29 May 2026

Keystones #149 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra

    Solve: 2x + 9 = 27

    Answer: x = 9
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio

    Divide 216 in the ratio 1:1:2

    Answer: 54, 54 and 108
  5. 5. Statistics

    Calculate the mean of: 9, 44, 28, 36, 41, 32, 10

    Answer: 28.6