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Cornerstone · Grades 3–5 Keystones #1 6 December 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 December 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 1⁄8

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 7x + 11 = 67

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

    Calculate the hypotenuse when a = 10cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 17.2cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 3:4

    Answer: 18 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 21, 6, 23, 50, 19, 36, 32, 28. Give your answer to 2 decimal places

    Answer: 26.88

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