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Cornerstone · Grades 3–5 Keystones #1 20 September 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 September 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 7⁄8

    Answer: 43⁄40
  2. 2. Algebra Two-step equations

    Solve: 6x - 13 = 11

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 171 in the ratio 3:2:4

    Answer: 57, 38 and 76
  5. 5. Statistics Mean

    Find the mean of: 14, 18, 15, 6, 7

    Answer: 12

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