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Cornerstone · Grades 3–5 Keystones #1 11 May 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 May 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 3⁄7

    Answer: 36⁄35
  2. 2. Algebra Two-step equations

    Solve: 6x + 3 = 63

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 171 in the ratio 4:4:1

    Answer: 76, 76 and 19
  5. 5. Statistics Mean

    Calculate the mean of: 19, 16, 45, 22, 13, 7, 44, 25

    Answer: 23.9

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