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Cornerstone · Grades 3–5 Keystones #1 11 October 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 4⁄7

    Answer: 81⁄56
  2. 2. Algebra Two-step equations

    Solve: 2x + 7 = 19

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 99 in the ratio 4:1:4

    Answer: 44, 11 and 44
  5. 5. Statistics Mean

    Find the mean of: 7, 2, 6

    Answer: 5

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