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Cornerstone · Grades 3–5 Keystones #1 10 March 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 10 March 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄11 + 4⁄11

    Answer: 7⁄11
  2. 2. Algebra Two-step equations

    Solve: 5x - 7 = 43

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 98 in the ratio 1:4:2

    Answer: 14, 56 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 31, 23, 49, 40, 50, 15. Give your answer to 2 decimal places

    Answer: 34.67

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