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Cornerstone Jan 1 - 7 25 questions
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Monday 3 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 65 + ? = 134

    Answer: 69
  2. 2. Algebra

    Solve: 3x = 12

    Answer: x = 4
  3. 3. Geometry

    Find the area of a circle with radius 4cm

    Answer: 50.27cm²
  4. 4. Ratio

    Simplify: 12:8:12

    Answer: 3:2:3
  5. 5. Statistics

    Find the mean of: 16, 14, 17

    Answer: 15.666666666667

Tuesday 4 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 342 + 658

    Answer: 342 + 658 = 1000
  2. 2. Algebra

    Expand: 2(6x + 4)

    Answer: 12x + 8
  3. 3. Geometry

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

    Answer: 10cm
  4. 4. Ratio

    Simplify the ratio 18:6

    Answer: 3:1
  5. 5. Statistics

    A bag has 7 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 711

Wednesday 5 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 30 + 29

    Answer: 30 + 29 = 59
  2. 2. Algebra

    Solve: x + 13 = 28

    Answer: x = 15
  3. 3. Geometry

    Calculate the area of a circle with diameter 18cm

    Answer: 254.47cm²
  4. 4. Ratio

    Simplify the ratio 24:16

    Answer: 3:2
  5. 5. Statistics

    Find the range of: 19, 14, 26, 11, 20

    Answer: 15

Thursday 6 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 18 + 35

    Answer: 2940
  2. 2. Algebra

    Solve: x + 7 = 18

    Answer: x = 11
  3. 3. Geometry

    Opposite = 12cm, hypotenuse = 24cm. Find the angle

    Answer: 30° (approximately)
  4. 4. Ratio

    Simplify the ratio 8:16

    Answer: 1:2
  5. 5. Statistics

    Find the mean of: 9, 9, 9, 4, 7

    Answer: 7.6

Friday 7 January 2022

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 54 + 44

    Answer: 54 + 44 = 98
  2. 2. Algebra

    Factorise: 5x² + 5x

    Answer: 5x(x + 1)
  3. 3. Geometry

    Opposite = 20cm, adjacent = 11cm. Calculate the angle

    Answer: 61.2°
  4. 4. Ratio

    Simplify the ratio 30:40

    Answer: 3:4
  5. 5. Statistics

    Calculate the range of: 57, 21, 40, 62, 35, 41

    Answer: 41