Mathematics

Which of the following pairs of fractions are not equivalent? 1. 2. 3. 4.

Fractions

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Answer

Check each option using cross multiplication:

  1. 3 × 20 = 60 and 4 × 15 = 60. Equal, so equivalent.

  2. 14 × 6 = 84 and 21 × 4 = 84. Equal, so equivalent.

  3. 8 × 15 = 120 and 10 × 12 = 120. Equal, so equivalent.

  4. 6 × 25 = 150 and 14 × 10 = 140. Not equal, so not equivalent.

Hence, option 4 is the correct option.

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