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Cornerstone · Grades 3–5 Keystones #1 8 December 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄5

    Answer: 9⁄20
  2. 2. Algebra Two-step equations

    Solve: 4x - 7 = 53

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 14.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 130 in the ratio 2:2:1

    Answer: 52, 52 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 8, 16, 33, 20, 29, 13. Give your answer to 2 decimal places

    Answer: 19.83

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