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Cornerstone Jul 5 - 11 25 questions
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Monday 5 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 37 + 14

    Answer: 1928
  2. 2. Algebra

    Solve: 4x + 13 = 57

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio

    Divide 130 in the ratio 3:3:4

    Answer: 39, 39 and 52
  5. 5. Statistics

    Find the mean of: 14, 6, 16, 9, 3

    Answer: 9.6

Tuesday 6 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 23 + 46

    Answer: 43
  2. 2. Algebra

    Solve: 6x + 10 = 34

    Answer: x = 4
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 10cm

    Answer: 12.81cm
  4. 4. Ratio

    Divide 252 in the ratio 3:2:4

    Answer: 84, 56 and 112
  5. 5. Statistics

    Find the mean of: 9, 16, 10, 14

    Answer: 12.25

Wednesday 7 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 311 + 111

    Answer: 411
  2. 2. Algebra

    Solve: 4x - 6 = 26

    Answer: x = 8
  3. 3. Geometry

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

    Answer: 29cm
  4. 4. Ratio

    Divide 60 in the ratio 2:1:1

    Answer: 30, 15 and 15
  5. 5. Statistics

    Calculate the mean of: 27, 48, 12, 33, 25, 41, 24, 38

    Answer: 31

Thursday 8 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 16 + 36

    Answer: 23
  2. 2. Algebra

    Solve: 3x - 6 = 6

    Answer: x = 4
  3. 3. Geometry

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

    Answer: 13cm
  4. 4. Ratio

    Divide 216 in the ratio 1:4:4

    Answer: 24, 96 and 96
  5. 5. Statistics

    Calculate the mean of: 18, 38, 45, 6, 10, 40, 27, 41

    Answer: 28.1

Friday 9 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 26 + 34

    Answer: 1312
  2. 2. Algebra

    Solve: 7x + 3 = 73

    Answer: x = 10
  3. 3. Geometry

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

    Answer: 7.81cm
  4. 4. Ratio

    Divide 138 in the ratio 1:4:1

    Answer: 23, 92 and 23
  5. 5. Statistics

    Find the mean of: 11, 8, 20, 2, 7

    Answer: 9.6