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Cornerstone · Grades 3–5 Keystones #1 17 February 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 1⁄3

    Answer: 8⁄15
  2. 2. Algebra Two-step equations

    Solve: 2x + 3 = 17

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 105 in the ratio 4:3

    Answer: 60 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 42, 30, 8, 23, 29, 8. Give your answer to 2 decimal places

    Answer: 23.33

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