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Lintel Jan 1 - 7 25 questions
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Monday 24 February 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 7.08 + 21.07 + 0.297

    Answer: 7.08 + 21.07 + 0.297 = 28.447
  2. 2. Algebra

    Solve: x7 = 4.1428571428571

    Answer: x = 29
  3. 3. Geometry

    Adjacent = 30cm, hypotenuse = 39cm. Find the angle

    Answer: 39.7°
  4. 4. Ratio

    Simplify: 24:24:20

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

    A bag has 4 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 25

Tuesday 25 February 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 36 + 25

    Answer: 910
  2. 2. Algebra

    Factorise: 8x² + 3x

    Answer: x(8x + 3)
  3. 3. Geometry

    Opposite = 17cm, adjacent = 19cm. Calculate the angle

    Answer: 41.8°
  4. 4. Ratio

    Simplify: 18:9:12

    Answer: 6:3:4
  5. 5. Statistics

    Find the range of: 18, -24, 15, -17, 47

    Answer: 71

Wednesday 26 February 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 129. What are the numbers?

    Answer: 42, 43, and 44
  2. 2. Algebra

    Solve: 9x = 27

    Answer: x = 3
  3. 3. Geometry

    Find perimeter: adjacent = 20cm, angle = 40°

    Answer: 62.9cm
  4. 4. Ratio

    Simplify: 10:6:4

    Answer: 5:3:2
  5. 5. Statistics

    Find the range of: 8, 21, -3, -15, 4

    Answer: 36

Thursday 27 February 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    What is the missing number: 74 + ? = 126

    Answer: 52
  2. 2. Algebra

    Factorise fully: 14x² + 10x

    Answer: 2x(7x + 5)
  3. 3. Geometry

    Calculate the area of a circle with diameter 23cm

    Answer: 415.48cm²
  4. 4. Ratio

    Simplify: 16:24:12

    Answer: 4:6:3
  5. 5. Statistics

    A bag has 4 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 25

Friday 28 February 2025

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    940000

    Answer: 9.4 × 105
  2. 2. Algebra

    Find the next term: 1, 4, 10, 19, ...

    Answer: 31
  3. 3. Geometry

    Calculate the area of a circle with diameter 18cm

    Answer: 254.47cm²
  4. 4. Ratio

    Simplify: 9:6:12

    Answer: 3:2:4
  5. 5. Statistics

    Calculate the mean of: 35, 8, 47, 49, 18, 16, 31

    Answer: 29.1