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Cornerstone · Grades 3–5 Keystones #1 30 December 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 30 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 1⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 7x + 12 = 40

    Answer: x = 4
  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

    Divide 168 in the ratio 3:2:1

    Answer: 84, 56 and 28
  5. 5. Statistics Mean

    Find the mean of: 5, 17, 14, 17, 8

    Answer: 12.2

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