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Cornerstone · Grades 3–5 Keystones #1 12 July 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 6x - 18 = 72

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 175 in the ratio 1:2:4

    Answer: 25, 50 and 100
  5. 5. Statistics Mean

    Calculate the mean of: 23, 15, 44, 17, 28, 12, 40, 27

    Answer: 25.8

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