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Cornerstone · Grades 3–5 Keystones #1 15 October 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 October 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 1⁄3

    Answer: 17⁄24
  2. 2. Algebra Two-step equations

    Solve: 4x + 6 = 54

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 128 in the ratio 4:3:1

    Answer: 64, 48 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 30, 14, 50, 43, 18, 50, 13

    Answer: 31.1

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