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Cornerstone · Grades 3–5 Keystones #1 22 January 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 2⁄4

    Answer: 13⁄14
  2. 2. Algebra Two-step equations

    Solve: 5x + 3 = 28

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 108 in the ratio 4:1:4

    Answer: 48, 12 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 38, 26, 22, 49, 26, 12, 8

    Answer: 25.9

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