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Cornerstone · Grades 3–5 Keystones #1 20 September 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 September 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 4⁄5

    Answer: 67⁄40
  2. 2. Algebra Two-step equations

    Solve: 5x + 4 = 49

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 4:1

    Answer: 52 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 9, 13, 7, 48, 9, 8. Give your answer to 2 decimal places

    Answer: 15.67

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