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Cornerstone · Grades 3–5 Keystones #1 14 October 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 7⁄8

    Answer: 9⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x - 14 = 21

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 3:4

    Answer: 30 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 5, 18, 22, 46, 40, 21, 43, 17

    Answer: 26.5

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