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Cornerstone · Grades 3–5 Keystones #1 18 June 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 June 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄5

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 39

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 8.54cm
  4. 4. Ratio Sharing in a ratio

    Divide 115 in the ratio 3:1:1

    Answer: 69, 23 and 23
  5. 5. Statistics Mean

    Find the mean of: 19, 6, 19, 16

    Answer: 15

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