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Lintel Mar 2 - 8 25 questions
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Monday 2 March 2026

Keystones #61 · Five questions · Open this day only

  1. 1. Number

    Multiply: 9.3 × 106 × 2.7 × 104

    Answer: 2.51 × 1011
  2. 2. Algebra

    Solve: x² -x - 2 = 0

    Answer: x = 2 or x = -1
  3. 3. Geometry

    Adjacent = 23cm, hypotenuse = 32cm. Find the angle

    Answer: 44°
  4. 4. Ratio

    After a 29% decrease, a value is 84.49. What was the original?

    Answer: 119
  5. 5. Statistics

    Calculate the range of: 66, 88, 96, 21, 28, 85

    Answer: 75

Tuesday 3 March 2026

Keystones #62 · Five questions · Open this day only

  1. 1. Number

    Calculate: 7.1 × 103 × 2.6 × 103

    Answer: 1.846 × 107
  2. 2. Algebra

    Solve: x² - 13x + 42 = 0

    Answer: x = -6 or x = -7
  3. 3. Geometry

    Opposite = 17cm, adjacent = 18cm. Calculate the angle

    Answer: 43.4°
  4. 4. Ratio

    After a 25% decrease, a value is 338.25. What was the original?

    Answer: 451
  5. 5. Statistics

    Find the range of: -28, -5, 35, 29, 17

    Answer: 63

Wednesday 4 March 2026

Keystones #63 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5.4 × 104 × 8.7 × 103

    Answer: 4.698 × 108
  2. 2. Algebra

    Solve: x² - 7x + 10 = 0

    Answer: x = -5 or x = -2
  3. 3. Geometry

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

    Answer: 39.8°
  4. 4. Ratio

    A price of £277.20 includes a 20% increase. What was the price before the increase?

    Answer: £231.00
  5. 5. Statistics

    Calculate the range of: 39, 38, 74, 52, 32, 72

    Answer: 42

Thursday 5 March 2026

Keystones #64 · Five questions · Open this day only

  1. 1. Number

    Multiply: 9.9 × 106 × 8.3 × 105

    Answer: 8.22 × 1012
  2. 2. Algebra

    Solve: x² + x - 12 = 0

    Answer: x = 3 or x = -4
  3. 3. Geometry

    Adjacent = 27cm, hypotenuse = 42cm. Find the angle

    Answer: 50°
  4. 4. Ratio

    A price of £863.17 includes a 33% increase. What was the price before the increase?

    Answer: £649.00
  5. 5. Statistics

    Find the range of: 21, 31, -14, 31, -16

    Answer: 47

Friday 6 March 2026

Keystones #65 · Five questions · Open this day only

  1. 1. Number

    Calculate: 9.3 × 103 × 8.3 × 104

    Answer: 7.719 × 108
  2. 2. Algebra

    Solve: x² -3x - 28 = 0

    Answer: x = 7 or x = -4
  3. 3. Geometry

    Opposite = 11cm, adjacent = 20cm. Calculate the angle

    Answer: 28.8°
  4. 4. Ratio

    A price of £531.19 includes a 21% increase. What was the price before the increase?

    Answer: £439.00
  5. 5. Statistics

    Find the range of: -10, 41, 28, -1, 19

    Answer: 51