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

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

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 1⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x + 11 = 32

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 3:2

    Answer: 39 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 18, 10, 42, 7, 24, 16, 13

    Answer: 18.6

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