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Cornerstone · Grades 3–5 Keystones #1 24 July 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 24 July 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 7⁄8

    Answer: 13⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x - 8 = 31

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 3:1

    Answer: 27 and 9
  5. 5. Statistics Mean

    Calculate the mean of: 40, 50, 21, 21, 28, 39, 12, 25

    Answer: 29.5

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