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Cornerstone · Grades 3–5 Keystones #1 16 January 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 January 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄8

    Answer: 11⁄28
  2. 2. Algebra Two-step equations

    Solve: 7x - 15 = 62

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 6, 9, 11, 29, 30, 17, 21. Give your answer to 2 decimal places

    Answer: 17.57

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