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Lintel May 7 - 13 25 questions
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Monday 11 May 2026

Keystones #131 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄6 + 1⁄2 + 1⁄2

    Answer: 4⁄3
  2. 2. Algebra

    For y = x³ + 5, calculate y when x = 3

    Answer: y = 32
  3. 3. Geometry

    Opposite = 19cm, adjacent = 12cm. Calculate the angle

    Answer: 57.7°
  4. 4. Ratio

    Simplify the ratio 8m:800cm

    Answer: 1:100
  5. 5. Statistics

    A spinner has 4 red, 6 blue and 5 green sections. Probability of landing on red?

    Answer: 4⁄15

Tuesday 12 May 2026

Keystones #132 · Five questions · Open this day only

  1. 1. Number

    Add: 1⁄5 + 2⁄3

    Answer: 13⁄15
  2. 2. Algebra

    Solve: 7x = 63

    Answer: x = 9
  3. 3. Geometry

    Adjacent = 18cm, hypotenuse = 26cm. Find the angle

    Answer: 46.2°
  4. 4. Ratio

    Calculate 49.2% of 527

    Answer: 259.28
  5. 5. Statistics

    A spinner has 5 red, 2 blue and 3 green sections. Probability of landing on red?

    Answer: 1⁄2

Wednesday 13 May 2026

Keystones #133 · Five questions · Open this day only

  1. 1. Number

    Calculate: 996 + 724

    Answer: 1720
  2. 2. Algebra

    Solve: 7x + 7 = 5x - 7

    Answer: x = 7
  3. 3. Geometry

    Opposite = 16cm, adjacent = 8cm. Calculate the angle

    Answer: 63.4°
  4. 4. Ratio

    Calculate 37.3% of 799

    Answer: 298.03
  5. 5. Statistics

    Calculate the mean of: 41, 19, 12, 23, 38, 9

    Answer: 23.7

Thursday 14 May 2026

Keystones #134 · Five questions · Open this day only

  1. 1. Number

    Calculate: 992 + 709

    Answer: 1701
  2. 2. Algebra

    Solve: x⁄7 = 5.2857142857143

    Answer: x = 37
  3. 3. Geometry

    Opposite = 14cm, adjacent = 11cm. Calculate the angle

    Answer: 51.8°
  4. 4. Ratio

    Simplify: 20:20:24

    Answer: 5:5:6
  5. 5. Statistics

    A spinner has 3 red, 6 blue and 5 green sections. Probability of landing on red?

    Answer: 3⁄14

Friday 15 May 2026

Keystones #135 · Five questions · Open this day only

  1. 1. Number

    Calculate: 420 + 618

    Answer: 420 + 618 = 1038
  2. 2. Algebra

    For y = x³ + 13, calculate y when x = 3

    Answer: y = 40
  3. 3. Geometry

    Find c if a = 16cm and b = 24cm in a right triangle

    Answer: 28.8cm
  4. 4. Ratio

    Find 25% of 429

    Answer: 107.25
  5. 5. Statistics

    Calculate the mean of: 18, 38, 42, 5, 21, 18

    Answer: 23.7