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Cornerstone · Grades 3–5 Keystones #1 21 April 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 April 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 1⁄4

    Answer: 9⁄8
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 21

    Answer: x = 3
  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 280 in the ratio 3:3:4

    Answer: 84, 84 and 112
  5. 5. Statistics Mean

    Find the mean of: 16, 16, 16, 2

    Answer: 12.5

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