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      Question

      There are some Crows and Cows in a field. If the total

      number of heads in the field is 480 and the total number of legs is 1320, what is the number of crows in the field?
      A 120 Correct Answer Incorrect Answer
      B 360 Correct Answer Incorrect Answer
      C 300 Correct Answer Incorrect Answer
      D 320 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Number of crows = 5/8├Ч 480 = 300 Alternate shortcut method: Number of cows = (4├Чnumber of legs тАУ number of feet)/2 = (4├Ч480 тАУ 1320 )/2┬а =┬а (1920 тАУ 1320 )/2 = 600/2 =300 Note: if number of cows is asked, then use this shortcut, Number of crows = (number of legs тАУ2├Чnumber of feet)/2┬а

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