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Cornerstone · Grades 3–5 Keystones #1 4 September 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 2⁄3

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x + 13 = 31

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 145 in the ratio 3:1:1

    Answer: 87, 29 and 29
  5. 5. Statistics Mean

    Calculate the mean of: 7, 45, 43, 41, 17, 27, 45

    Answer: 32.1

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