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Cornerstone · Grades 3–5 Keystones #1 18 July 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 1⁄3

    Answer: 13⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 13 = 40

    Answer: x = 9
  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

    Share 112 in the ratio 4:3

    Answer: 64 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 17, 50, 41, 37, 23, 49, 11

    Answer: 32.6

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