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Cornerstone · Grades 3–5 Keystones #1 18 December 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 18 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 28

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 176 in the ratio 2:1:1

    Answer: 88, 44 and 44
  5. 5. Statistics Mean

    Find the mean of: 16, 13, 17

    Answer: 15.333333333333

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