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Cornerstone · Grades 3–5 Keystones #1 8 May 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 May 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 4⁄5

    Answer: 31⁄20
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 63

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 8cm

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 253 in the ratio 4:3:4

    Answer: 92, 69 and 92
  5. 5. Statistics Mean

    Calculate the mean of: 17, 18, 42, 24, 20, 30, 37, 8

    Answer: 24.5

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