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Lintel May 25 - 31 25 questions
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Monday 25 May 2026

Keystones #145 · Five questions · Open this day only

  1. 1. Number

    0.048

    Answer: 4.8 × 10-2
  2. 2. Algebra

    Factorise: x² + x - 20

    Answer: (x + 5)(x - 4)
  3. 3. Geometry

    Adjacent = 19cm, angle = 56°. Find opposite

    Answer: 28.2cm
  4. 4. Ratio

    Simplify the ratio 3m:300cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 6 numbers is 29. If 5 of them are 29, 18, 27, 43, 23, what is the missing number?

    Answer: 34

Tuesday 26 May 2026

Keystones #146 · Five questions · Open this day only

  1. 1. Number

    9800000

    Answer: 9.8 × 106
  2. 2. Algebra

    Factorise: x² + 3x - 4

    Answer: (x + 4)(x - 1)
  3. 3. Geometry

    Hypotenuse = 23cm, angle = 52°. Find adjacent side

    Answer: 14.2cm
  4. 4. Ratio

    In ratio 2:3:3, what fraction is the second part?

    Answer: 38
  5. 5. Statistics

    The mean of 4 numbers is 38. If 3 of them are 34, 34, 49, what is the missing number?

    Answer: 35

Wednesday 27 May 2026

Keystones #147 · Five questions · Open this day only

  1. 1. Number

    0.00064

    Answer: 6.4 × 10-4
  2. 2. Algebra

    Factorise: x² - 8x + 12

    Answer: (x - 6)(x - 2)
  3. 3. Geometry

    Adjacent = 22cm, angle = 33°. Find opposite

    Answer: 14.3cm
  4. 4. Ratio

    In ratio 4:3:1, what fraction is the second part?

    Answer: 38
  5. 5. Statistics

    Calculate the mean of: 47, 17, 40, 6, 14, 47, 7, 33

    Answer: 26.4

Thursday 28 May 2026

Keystones #148 · Five questions · Open this day only

  1. 1. Number

    0.065

    Answer: 6.5 × 10-2
  2. 2. Algebra

    Factorise: x² + 3x - 18

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

    Adjacent = 17cm, angle = 38°. Find opposite

    Answer: 13.3cm
  4. 4. Ratio

    In ratio 2:2:3, what fraction is the second part?

    Answer: 27
  5. 5. Statistics

    Calculate the mean of: 28, 28, 9, 23, 8, 37

    Answer: 22.2

Friday 29 May 2026

Keystones #149 · Five questions · Open this day only

  1. 1. Number

    97000000

    Answer: 9.7 × 107
  2. 2. Algebra

    Factorise: x² + x - 2

    Answer: (x + 2)(x - 1)
  3. 3. Geometry

    Hypotenuse = 26cm, angle = 38°. Find adjacent side

    Answer: 20.5cm
  4. 4. Ratio

    £308.00 is shared between A and B in the ratio 3:4. How much does A receive?

    Answer: £132.00
  5. 5. Statistics

    The mean of 6 numbers is 32. If 5 of them are 41, 27, 29, 29, 31, what is the missing number?

    Answer: 35