Change pack
Lintel Jun 18 - 24 25 questions
PDF (questions) PDF (answers)

Monday 15 June 2026

Keystones #166 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 51 + ? = 159

    Answer: 108
  2. 2. Algebra

    Solve: 4x = 28

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 4cm

    Answer: 6.4cm
  4. 4. Ratio

    Simplify the ratio 6m:600cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 8 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 8⁄15

Tuesday 16 June 2026

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 997 + 891

    Answer: 1888
  2. 2. Algebra

    Expand: 4(3x + 4)

    Answer: 12x + 16
  3. 3. Geometry

    A right triangle has hypotenuse 5cm and one side 3cm. Find its area

    Answer: 6cm²
  4. 4. Ratio

    Simplify the ratio 3m:300cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 3 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 3⁄7

Wednesday 17 June 2026

Keystones #2 · Five questions · Open this day only

  1. 1. Number

    Calculate: 173 + 163

    Answer: 173 + 163 = 336
  2. 2. Algebra

    Factorise fully: 12x² + 24x

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

    Calculate the hypotenuse when a = 11cm and b = 12cm

    Answer: 16.28cm
  4. 4. Ratio

    Calculate 23.5% of 587

    Answer: 137.95
  5. 5. Statistics

    Find the range of: 38, 12, 42, 12, -28

    Answer: 70

Thursday 18 June 2026

Keystones #3 · Five questions · Open this day only

  1. 1. Number

    Simplify: 11√3 - 7√3

    Answer: 4√3
  2. 2. Algebra

    Solve: x⁄5 = 6.4

    Answer: x = 32
  3. 3. Geometry

    Opposite = 20cm, adjacent = 15cm. Calculate the angle

    Answer: 53.1°
  4. 4. Ratio

    Calculate 21.6% of 700

    Answer: 151.2
  5. 5. Statistics

    A spinner has 3 red, 2 blue and 3 green sections. Probability of landing on red?

    Answer: 3⁄8

Friday 19 June 2026

Keystones #4 · Five questions · Open this day only

  1. 1. Number

    Calculate: 998 + 625

    Answer: 1623
  2. 2. Algebra

    What is the next term? 5, 15, 45, 135, ...

    Answer: 405
  3. 3. Geometry

    Find c if a = 15cm and b = 12cm in a right triangle

    Answer: 19.2cm
  4. 4. Ratio

    Simplify the ratio 4m:400cm

    Answer: 1:100
  5. 5. Statistics

    Calculate the mean of: 29, 47, 25, 37, 35, 37

    Answer: 35