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Cornerstone · Grades 3–5 Keystones #1 11 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 3⁄4

    Answer: 13⁄8
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 66

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 11.31cm
  4. 4. Ratio Sharing in a ratio

    Divide 171 in the ratio 4:3:2

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

    Find the mean of: 10, 15, 13, 18

    Answer: 14

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