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Cornerstone · Grades 3–5 Keystones #1 6 December 2016 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 December 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 2⁄3

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

    Solve: 6x + 15 = 51

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 17.49cm
  4. 4. Ratio Sharing in a ratio

    Share 50 in the ratio 3:2

    Answer: 30 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 20, 18, 48, 30, 22, 28, 9, 6. Give your answer to 2 decimal places

    Answer: 22.63

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