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Lintel Apr 2 - 8 25 questions
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Monday 30 March 2026

Keystones #89 · Five questions · Open this day only

  1. 1. Number

    Find the total of 151, 195, and 84

    Answer: 430
  2. 2. Algebra

    Solve: x⁄8 = 2.625

    Answer: x = 21
  3. 3. Geometry

    Adjacent = 21cm, hypotenuse = 36cm. Find the angle

    Answer: 54.3°
  4. 4. Ratio

    Simplify: 10:4:8

    Answer: 5:2:4
  5. 5. Statistics

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

    Answer: 4⁄7

Tuesday 31 March 2026

Keystones #90 · Five questions · Open this day only

  1. 1. Number

    The temperature is -13°C. It rises by 20°C. What is the new temperature?

    Answer: 7°C
  2. 2. Algebra

    Solve: 4x = 40

    Answer: x = 10
  3. 3. Geometry

    Calculate the area of a circle with diameter 12cm

    Answer: 113.cm²
  4. 4. Ratio

    Find 75% of 212

    Answer: 159
  5. 5. Statistics

    Find the range of: 25, 0, 20, 28, -12

    Answer: 40

Wednesday 1 April 2026

Keystones #91 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 99 + ? = 159

    Answer: 60
  2. 2. Algebra

    Solve: 8x = 40

    Answer: x = 5
  3. 3. Geometry

    Calculate the distance between (3, 3) and (6, 7)

    Answer: 5
  4. 4. Ratio

    Calculate 33.8% of 793

    Answer: 268.03
  5. 5. Statistics

    Find the range of: 10, -19, 29, -7, -21

    Answer: 50

Thursday 2 April 2026

Keystones #92 · Five questions · Open this day only

  1. 1. Number

    Calculate: 1⁄5 + 1⁄4 + 5⁄6

    Answer: 77⁄60
  2. 2. Algebra

    Factorise: 2x² + 7x

    Answer: x(2x + 7)
  3. 3. Geometry

    Find the perimeter: hypotenuse = 18cm, one side = 14cm

    Answer: 43.3cm
  4. 4. Ratio

    Calculate 36.7% of 452

    Answer: 165.88
  5. 5. Statistics

    Find the range of: 11, 13, 25, -29, -22

    Answer: 54

Friday 3 April 2026

Keystones #93 · Five questions · Open this day only

  1. 1. Number

    Calculate: 785 + 882

    Answer: 785 + 882 = 1667
  2. 2. Algebra

    Find the next term: 1, 3, 7, 13, ...

    Answer: 21
  3. 3. Geometry

    Opposite = 10cm, adjacent = 19cm. Calculate the angle

    Answer: 27.8°
  4. 4. Ratio

    Calculate 44% of 750

    Answer: 330
  5. 5. Statistics

    A bag has 7 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 7⁄12