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Capstone Mar 19 - 25 25 questions
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Monday 16 March 2026

Keystones #75 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 111. What are the numbers?

    Answer: 36, 37, and 38
  2. 2. Algebra

    Solve: x⁄7 = 5.2857142857143

    Answer: x = 37
  3. 3. Geometry

    Adjacent = 30cm, hypotenuse = 36cm. Find the angle

    Answer: 33.6°
  4. 4. Ratio

    Calculate 18.1% of 335

    Answer: 60.64
  5. 5. Statistics

    The mean of 4 numbers is 31. If 3 of them are 21, 47, 24, what is the missing number?

    Answer: 32

Tuesday 17 March 2026

Keystones #76 · Five questions · Open this day only

  1. 1. Number

    0.084

    Answer: 8.4 × 10^-2
  2. 2. Algebra

    Find the next term: 1, 2, 4, 7, ...

    Answer: 11
  3. 3. Geometry

    Adjacent = 17cm, hypotenuse = 27cm. Find the angle

    Answer: 51°
  4. 4. Ratio

    Simplify the ratio 5m:500cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 4 numbers is 33. If 3 of them are 48, 27, 44, what is the missing number?

    Answer: 13

Wednesday 18 March 2026

Keystones #77 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 132. What are the numbers?

    Answer: 43, 44, and 45
  2. 2. Algebra

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

    Answer: 21
  3. 3. Geometry

    Adjacent = 15cm, hypotenuse = 21cm. Find the angle

    Answer: 44.4°
  4. 4. Ratio

    Simplify the ratio 7m:700cm

    Answer: 1:100
  5. 5. Statistics

    A spinner has 6 red, 2 blue and 5 green sections. Probability of landing on red?

    Answer: 6⁄13

Thursday 19 March 2026

Keystones #78 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄6 + 1⁄2 + 5⁄6

    Answer: 11⁄6
  2. 2. Algebra

    Solve: x⁄2 = 16.5

    Answer: x = 33
  3. 3. Geometry

    Adjacent = 27cm, hypotenuse = 39cm. Find the angle

    Answer: 46.2°
  4. 4. Ratio

    Simplify the ratio 6m:600cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 4 numbers is 36. If 3 of them are 34, 34, 35, what is the missing number?

    Answer: 41

Friday 20 March 2026

Keystones #79 · Five questions · Open this day only

  1. 1. Number

    The sum of three consecutive numbers is 126. What are the numbers?

    Answer: 41, 42, and 43
  2. 2. Algebra

    Factorise fully: 12x² + 8x

    Answer: 4x(3x + 2)
  3. 3. Geometry

    Find c if a = 9cm and b = 13cm in a right triangle

    Answer: 15.8cm
  4. 4. Ratio

    Simplify the ratio 6m:600cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 5 numbers is 35. If 4 of them are 33, 28, 22, 15, what is the missing number?

    Answer: 77