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

  1. 1. Number Adding fractions

    Add: 3⁄5 + 3⁄8

    Answer: 39⁄40
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 26

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 198 in the ratio 3:4:4

    Answer: 54, 72 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 41, 23, 15, 24, 39, 8

    Answer: 25

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