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Cornerstone · Grades 3–5 Keystones #1 25 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 1⁄6

    Answer: 17⁄30
  2. 2. Algebra Two-step equations

    Solve: 7x - 11 = 94

    Answer: x = 15
  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 98 in the ratio 3:4

    Answer: 42 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 15, 50, 33, 27, 46, 47, 25, 29

    Answer: 34

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