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Cornerstone · Grades 3–5 Keystones #1 30 December 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 3⁄5

    Answer: 51⁄35
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 56

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 1:4:4

    Answer: 16, 64 and 64
  5. 5. Statistics Mean

    Find the mean of: 18, 5, 17

    Answer: 13.333333333333

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