Exams › SSC CGL (Prelims) › General

In a zoo, there are only deer and birds. The total number of heads is 36 and the total number of legs is 100. How many birds are there?

1. 20
2. 16
3. 18
4. 22

Correct answer: 22

Solution

Let birds be $b$ and deer be $d$. Then $b+d=36$ and $2b+4d=100$. Solving gives $d=14$ and $b=22$.

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