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Cornerstone · Grades 3–5 Keystones #1 24 December 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 2⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 57

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 2:3:1

    Answer: 42, 63 and 21
  5. 5. Statistics Mean

    Find the mean of: 3, 4, 11, 14

    Answer: 8

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