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Cornerstone Jan 1 - 7 25 questions
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Monday 24 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 96 + 53

    Answer: 96 + 53 = 149
  2. 2. Algebra

    Factorise: 2x² + 4x

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

    Opposite = 19cm, adjacent = 11cm. Calculate the angle

    Answer: 59.9°
  4. 4. Ratio

    Simplify the ratio 6:8

    Answer: 3:4
  5. 5. Statistics

    Find the mean of: 20, 18, 20, 5, 6

    Answer: 13.8

Tuesday 25 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Find the total of 169, 248, and 133

    Answer: 550
  2. 2. Algebra

    Solve: x + 9 = 13

    Answer: x = 4
  3. 3. Geometry

    Find the area of a circle with radius 4cm

    Answer: 50.27cm²
  4. 4. Ratio

    Calculate 25% of 69

    Answer: 17.25
  5. 5. Statistics

    Calculate the mean of: 36, 12, 24, 15, 18, 13

    Answer: 19.7

Wednesday 26 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 74 + 42

    Answer: 74 + 42 = 116
  2. 2. Algebra

    Solve: x + 9 = 13

    Answer: x = 4
  3. 3. Geometry

    Calculate the area of a circle with diameter 21cm

    Answer: 346.36cm²
  4. 4. Ratio

    Calculate 50% of 154

    Answer: 77
  5. 5. Statistics

    Calculate the range of: 81, 76, 36, 94, 49, 75

    Answer: 58

Thursday 27 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 32 + ? = 190

    Answer: 158
  2. 2. Algebra

    Solve: 7x = 91

    Answer: x = 13
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio

    Simplify the ratio 12:21

    Answer: 4:7
  5. 5. Statistics

    What is the probability of getting heads when flipping a fair coin?

    Answer: 12

Friday 28 March 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 37 + 35

    Answer: 3635
  2. 2. Algebra

    Collect like terms: 5x + 2y + 7x + 4y

    Answer: 12x + 6y
  3. 3. Geometry

    Opposite = 14cm, hypotenuse = 28cm. Find the angle

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

    Calculate 25% of 52

    Answer: 13
  5. 5. Statistics

    Find the mean of: 13, 20, 6, 16, 3

    Answer: 11.6