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Cornerstone · Grades 3–5 Keystones #1 3 September 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 3⁄5

    Answer: 29⁄40
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 46

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 196 in the ratio 3:3:1

    Answer: 84, 84 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 44, 18, 17, 37, 18, 36, 34. Give your answer to 2 decimal places

    Answer: 29.14

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