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Cornerstone · Grades 3–5 Keystones #1 29 April 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 29 April 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 6⁄7

    Answer: 51⁄35
  2. 2. Algebra Two-step equations

    Solve: 6x + 15 = 33

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 260 in the ratio 2:2:1

    Answer: 104, 104 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 43, 31, 6, 16, 30, 15, 15, 15. Give your answer to 2 decimal places

    Answer: 21.38

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