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Cornerstone · Grades 3–5 Keystones #1 31 March 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 March 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 2⁄3

    Answer: 19⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 12 = 42

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 15, 6, 25, 28, 22, 35

    Answer: 21.8

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