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Capstone May 18 - 24 25 questions
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Monday 18 May 2026

Keystones #138 · Five questions · Open this day only

  1. 1. Number

    Multiply: 3.1 × 105 × 6 × 104

    Answer: 1.86 × 1010
  2. 2. Algebra

    Solve: 7x + 4 ≤ 6x - 3

    Answer: x ≤ 7
  3. 3. Geometry

    A right triangle has hypotenuse 5cm and one side 3cm. Find its area

    Answer: 6cm²
  4. 4. Ratio

    In ratio 5:3, the difference between shares is 92. What is the total?

    Answer: 368
  5. 5. Statistics

    Find the mode of: 62, 16, 34, 70, 42

    Answer: No mode

Tuesday 19 May 2026

Keystones #139 · Five questions · Open this day only

  1. 1. Number

    Multiply: 9.3 × 105 × 2.9 × 106

    Answer: 2.7 × 1012
  2. 2. Algebra

    Solve: 5x + 11 ≤ x - 4

    Answer: x ≤ 3.8
  3. 3. Geometry

    A right triangle has hypotenuse 13cm and one side 5cm. Find its area

    Answer: 30cm²
  4. 4. Ratio

    In ratio 3:2, the difference between shares is 86. What is the total?

    Answer: 430
  5. 5. Statistics

    Find the mode of: 13, 44, 70, 63, 34

    Answer: No mode

Wednesday 20 May 2026

Keystones #140 · Five questions · Open this day only

  1. 1. Number

    Multiply: 4.7 × 105 × 9.1 × 103

    Answer: 4.28 × 109
  2. 2. Algebra

    Solve: 8x + 11 ≤ 6x - 5

    Answer: x ≤ 8
  3. 3. Geometry

    A right triangle has hypotenuse 17cm and one side 8cm. Find its area

    Answer: 60cm²
  4. 4. Ratio

    In ratio 3:2, the difference between shares is 78. What is the total?

    Answer: 390
  5. 5. Statistics

    Find the mode of: 35, 13, 50, 65, 75

    Answer: No mode

Thursday 21 May 2026

Keystones #141 · Five questions · Open this day only

  1. 1. Number

    Multiply: 8.1 × 105 × 8.2 × 106

    Answer: 6.64 × 1012
  2. 2. Algebra

    Solve: 5x + 5 ≤ 2x - 5

    Answer: x ≤ 3.3
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 13cm and 7cm

    Answer: 45.5cm²
  4. 4. Ratio

    In ratio 7:2, the difference between shares is 150. What is the total?

    Answer: 270
  5. 5. Statistics

    Find the mode of: 58, 14, 25, 79, 49

    Answer: No mode

Friday 22 May 2026

Keystones #142 · Five questions · Open this day only

  1. 1. Number

    Multiply: 3.3 × 104 × 4.2 × 105

    Answer: 1.39 × 1010
  2. 2. Algebra

    Solve: 4x + 9 ≤ 2x - 6

    Answer: x ≤ 7.5
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 14cm and 8cm

    Answer: 56cm²
  4. 4. Ratio

    In ratio 5:3, the difference between shares is 74. What is the total?

    Answer: 296
  5. 5. Statistics

    Find the mode of: 75, 41, 33, 16, 63

    Answer: No mode