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### Primary 6 Problem Sums/Word Problems - Try FREE

- Ratio: Think units and you're on your way! > Ratio Exercise 6 > 2
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**Score :**

(Single Attempt)

**Question
**

Initially, the ratio of the number of zebras to the number of tigers in a zoo was 4:3.

After some tigers were brought into the zoo, the ratio of the number of zebras to tigers became 7:12.

If there were 144 tigers in the end, how many tigers were brought into the zoo?

The correct answer is :

**81**