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Cornerstone · Grades 3–5 Keystones #1 18 September 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 September 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 3⁄5

    Answer: 11⁄10
  2. 2. Algebra Two-step equations

    Solve: 8x - 9 = 111

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

    Answer: 30 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 21, 10, 47, 19, 35, 48

    Answer: 30

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