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Cornerstone · Grades 3–5 Keystones #1 19 January 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 19 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 4⁄5

    Answer: 29⁄30
  2. 2. Algebra Two-step equations

    Solve: 8x - 8 = 48

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 196 in the ratio 1:4:2

    Answer: 28, 112 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 11, 47, 29, 5, 25, 49, 18, 19

    Answer: 25.4

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