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Cornerstone Jan 17 - 23 25 questions
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Monday 17 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄4 + 3⁄6

    Answer: 3⁄4
  2. 2. Algebra

    Solve: 5x + 10 = 25

    Answer: x = 3
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 13cm

    Answer: 15.26cm
  4. 4. Ratio

    Share 63 in the ratio 4:3

    Answer: 36 and 27
  5. 5. Statistics

    Calculate the mean of: 37, 16, 41, 30, 47, 34, 39

    Answer: 34.9

Tuesday 18 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 2⁄5 + 5⁄7

    Answer: 39⁄35
  2. 2. Algebra

    Solve: 7x + 8 = 64

    Answer: x = 8
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 8cm

    Answer: 9.43cm
  4. 4. Ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics

    Calculate the mean of: 25, 48, 32, 5, 33, 15

    Answer: 26.3

Wednesday 19 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄8 + 4⁄8

    Answer: 3⁄4
  2. 2. Algebra

    Solve: 5x - 9 = 61

    Answer: x = 14
  3. 3. Geometry

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

    Answer: 15cm
  4. 4. Ratio

    Share 20 in the ratio 1:3

    Answer: 5 and 15
  5. 5. Statistics

    Find the mean of: 10, 19, 19, 12

    Answer: 15

Thursday 20 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄7 + 2⁄4

    Answer: 15⁄14
  2. 2. Algebra

    Solve: 4x - 19 = 41

    Answer: x = 15
  3. 3. Geometry

    Calculate the hypotenuse when a = 3cm and b = 14cm

    Answer: 14.32cm
  4. 4. Ratio

    Share 64 in the ratio 1:3

    Answer: 16 and 48
  5. 5. Statistics

    Calculate the mean of: 36, 41, 20, 15, 24, 28

    Answer: 27.3

Friday 21 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄9 + 1⁄9

    Answer: 4⁄9
  2. 2. Algebra

    Solve: 4x + 12 = 56

    Answer: x = 11
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio

    Share 20 in the ratio 3:1

    Answer: 15 and 5
  5. 5. Statistics

    Find the mean of: 15, 20, 15, 3, 19

    Answer: 14.4