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

Five GCSE retrieval questions · 3 February 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄7

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 4x - 7 = 37

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 162 in the ratio 4:4:1

    Answer: 72, 72 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 10, 41, 8, 32, 48, 30, 15. Give your answer to 2 decimal places

    Answer: 26.29

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