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Cornerstone Jan 1 - 7 25 questions
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Monday 5 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 85 + 78

    Answer: 85 + 78 = 163
  2. 2. Algebra

    Solve: x + 15 = 33

    Answer: x = 18
  3. 3. Geometry

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

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

    Simplify the ratio 14:6

    Answer: 7:3
  5. 5. Statistics

    Find the mean of: 18, 12, 17, 16, 16

    Answer: 15.8

Tuesday 6 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 26 + (-43)

    Answer: -17
  2. 2. Algebra

    Factorise: 15x + 10

    Answer: 5(3x + 2)
  3. 3. Geometry

    Opposite = 12cm, adjacent = 12cm. Calculate the angle

    Answer: 45°
  4. 4. Ratio

    Calculate 25% of 39

    Answer: 9.75
  5. 5. Statistics

    Find the range of: 31, 25, 27, 18, 29

    Answer: 13

Wednesday 7 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 65 + 32

    Answer: 65 + 32 = 97
  2. 2. Algebra

    Solve: 4x = 32

    Answer: x = 8
  3. 3. Geometry

    Find the area of a circle with radius 9cm

    Answer: 254.47cm²
  4. 4. Ratio

    Simplify the ratio 12:8

    Answer: 3:2
  5. 5. Statistics

    Calculate the mean of: 36, 17, 37, 11, 38, 7, 7

    Answer: 21.9

Thursday 8 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 88 + 82

    Answer: 88 + 82 = 170
  2. 2. Algebra

    Solve: 8x = 88

    Answer: x = 11
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 6cm, 8cm, 10cm

    Answer: 24cm
  4. 4. Ratio

    Simplify the ratio 12:16

    Answer: 3:4
  5. 5. Statistics

    Calculate the range of: 85, 70, 45, 46, 68, 41

    Answer: 44

Friday 9 July 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: -28 + (-15)

    Answer: -43
  2. 2. Algebra

    Solve: x + 3 = 23

    Answer: x = 20
  3. 3. Geometry

    Opposite = 18cm, adjacent = 10cm. Calculate the angle

    Answer: 60.9°
  4. 4. Ratio

    Calculate 50% of 46

    Answer: 23
  5. 5. Statistics

    Find the mean of: 15, 17, 3

    Answer: 11.666666666667