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Cornerstone · Grades 3–5 Keystones #1 18 March 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 March 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 4⁄6

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 78

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Share 55 in the ratio 3:2

    Answer: 33 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 14, 40, 17, 47, 40, 28, 35, 40

    Answer: 32.6

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