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

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

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄5

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 2x + 15 = 25

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 36, 34, 21, 12, 44, 34. Give your answer to 2 decimal places

    Answer: 30.17

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