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Cornerstone · Grades 3–5 Keystones #1 10 August 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 10 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x + 13 = 22

    Answer: x = 3
  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 119 in the ratio 4:2:1

    Answer: 68, 34 and 17
  5. 5. Statistics Mean

    Find the mean of: 2, 10, 7

    Answer: 6.3333333333333

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