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Cornerstone · Grades 3–5 Keystones #1 17 May 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 May 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 2⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = 8

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 12.73cm
  4. 4. Ratio Sharing in a ratio

    Divide 75 in the ratio 3:1:1

    Answer: 45, 15 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 43, 30, 15, 28, 32, 6. Give your answer to 2 decimal places

    Answer: 25.67