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Cornerstone · Grades 3–5 Keystones #1 27 July 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 27 July 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 2⁄4

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

    Solve: 2x - 8 = 12

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 153 in the ratio 3:4:2

    Answer: 51, 68 and 34
  5. 5. Statistics Mean

    Find the mean of: 5, 10, 3, 20, 8

    Answer: 9.2

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