Multiple choice general knowledge

A person has certain number of cows and birds. They have 172 eyes and 344 legs. How many cows and birds does he have?

  1. 0 cow, 86 birds

  2. 86 birds, 5 cows

  3. 0birds , 86 cows

  4. 5birds , 86 cows
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let C = cows, B = birds. Eyes: 2C + 2B = 172 → C + B = 86. Legs: 4C + 2B = 344. Substituting B = 86 - C: 4C + 2(86 - C) = 344 → 4C + 172 - 2C = 344 → 2C = 172 → C = 86. Therefore B = 0. This means 86 cows and 0 birds, matching the solution.

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