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Cornerstone · Grades 3–5 Keystones #1 13 September 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 13 September 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 8x - 9 = 79

    Answer: x = 11
  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 196 in the ratio 1:2:4

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

    Calculate the mean of: 37, 32, 22, 19, 20, 40, 16

    Answer: 26.6

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