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Cornerstone · Grades 3–5 Keystones #1 13 April 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 13 April 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 59

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 63 in the ratio 3:4

    Answer: 27 and 36
  5. 5. Statistics Mean

    Find the mean of: 17, 8, 18, 17

    Answer: 15

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