Change pack
Cornerstone Apr 23 - 29 25 questions
PDF (questions) PDF (answers)

Monday 20 April 2026

Keystones #110 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 96 + ? = 160

    Answer: 64
  2. 2. Algebra

    Factorise: 24x + 24

    Answer: 4(6x + 6)
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 10cm and 12cm

    Answer: 60cm²
  4. 4. Ratio

    Simplify the ratio 9:6

    Answer: 3:2
  5. 5. Statistics

    Calculate the mean of: 16, 17, 26, 28, 33, 14, 16, 37

    Answer: 23.4

Tuesday 21 April 2026

Keystones #111 · Five questions · Open this day only

  1. 1. Number

    Calculate: 57 + 46

    Answer: 57 + 46 = 103
  2. 2. Algebra

    Collect like terms: 3x + 6y + 4x + 3y

    Answer: 7x + 9y
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 5cm, 12cm, 13cm

    Answer: 30cm
  4. 4. Ratio

    Simplify the ratio 8:10

    Answer: 4:5
  5. 5. Statistics

    Find the mean of: 18, 10, 8, 8, 10

    Answer: 10.8

Wednesday 22 April 2026

Keystones #112 · Five questions · Open this day only

  1. 1. Number

    Calculate: 738 + 643

    Answer: 738 + 643 = 1381
  2. 2. Algebra

    Solve: 9x = 90

    Answer: x = 10
  3. 3. Geometry

    Opposite = 15cm, adjacent = 18cm. Calculate the angle

    Answer: 39.8°
  4. 4. Ratio

    Calculate 25% of 184

    Answer: 46
  5. 5. Statistics

    Find the mean of: 14, 7, 5, 10, 3

    Answer: 7.8

Thursday 23 April 2026

Keystones #113 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄9 + 3⁄9

    Answer: 5⁄9
  2. 2. Algebra

    For y = x³, find y when x = 5

    Answer: y = 125
  3. 3. Geometry

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

    Answer: 24cm
  4. 4. Ratio

    Simplify the ratio 20:35

    Answer: 4:7
  5. 5. Statistics

    Calculate the range of: 81, 96, 45, 96, 45, 53

    Answer: 51

Friday 24 April 2026

Keystones #114 · Five questions · Open this day only

  1. 1. Number

    Simplify: 64 × 62

    Answer: 66
  2. 2. Algebra

    Solve: x + 11 = 25

    Answer: x = 14
  3. 3. Geometry

    Opposite = 15cm, hypotenuse = 21.2cm. Find the angle

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

    Simplify: 12:12:18

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

    Find the range of: 21, 24, 11, 9, 33

    Answer: 24