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Lintel Jun 8 - 14 25 questions
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Monday 8 June 2026

Keystones #159 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2.2 × 103 × 4.3 × 104

    Answer: 9.46 × 107
  2. 2. Algebra

    Solve: x² - 13x + 42 = 0

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

    Opposite = 16cm, adjacent = 14cm. Calculate the angle

    Answer: 48.8°
  4. 4. Ratio

    A price of £261.64 includes a 24% increase. What was the price before the increase?

    Answer: £211.00
  5. 5. Statistics

    Find the range of: 35, 15, 0, 48, -18

    Answer: 66

Tuesday 9 June 2026

Keystones #160 · Five questions · Open this day only

  1. 1. Number

    Multiply: 3.9 × 106 × 8.8 × 106

    Answer: 3.43 × 1013
  2. 2. Algebra

    Solve: x² + x - 30 = 0

    Answer: x = 5 or x = -6
  3. 3. Geometry

    Adjacent = 25cm, hypotenuse = 35cm. Find the angle

    Answer: 44.4°
  4. 4. Ratio

    A price of £904.40 includes a 33% increase. What was the price before the increase?

    Answer: £680.00
  5. 5. Statistics

    Calculate the range of: 77, 69, 88, 64, 81, 46

    Answer: 42

Wednesday 10 June 2026

Keystones #161 · Five questions · Open this day only

  1. 1. Number

    Multiply: 2 × 107 × 7.2 × 106

    Answer: 1.44 × 1014
  2. 2. Algebra

    Solve: x² + 0x - 4 = 0

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

    Opposite = 19cm, adjacent = 13cm. Calculate the angle

    Answer: 55.6°
  4. 4. Ratio

    A price of £963.48 includes a 24% increase. What was the price before the increase?

    Answer: £777.00
  5. 5. Statistics

    Calculate the range of: 79, 79, 52, 101, 32, 55

    Answer: 69

Thursday 11 June 2026

Keystones #162 · Five questions · Open this day only

  1. 1. Number

    Calculate: 8 × 103 × 3.2 × 105

    Answer: 2.56 × 109
  2. 2. Algebra

    Solve: x² - 8x + 12 = 0

    Answer: x = -2 or x = -6
  3. 3. Geometry

    Adjacent = 30cm, hypotenuse = 44cm. Find the angle

    Answer: 47°
  4. 4. Ratio

    A price of £858.52 includes a 27% increase. What was the price before the increase?

    Answer: £676.00
  5. 5. Statistics

    Find the range of: 46, 46, -11, -6, 43

    Answer: 57

Friday 12 June 2026

Keystones #163 · Five questions · Open this day only

  1. 1. Number

    Multiply: 7.1 × 105 × 5.1 × 106

    Answer: 3.62 × 1012
  2. 2. Algebra

    Solve: x² - 9x + 20 = 0

    Answer: x = -4 or x = -5
  3. 3. Geometry

    Opposite = 8cm, adjacent = 9cm. Calculate the angle

    Answer: 41.6°
  4. 4. Ratio

    A price of £459.34 includes a 19% increase. What was the price before the increase?

    Answer: £386.00
  5. 5. Statistics

    Find the range of: -30, 34, -24, 12, -14

    Answer: 64