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Cornerstone · Grades 3–5 Keystones #1 8 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 2⁄4

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 7x - 8 = 62

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 152 in the ratio 2:1:1

    Answer: 76, 38 and 38
  5. 5. Statistics Mean

    Find the mean of: 15, 9, 20

    Answer: 14.666666666667

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