**Find the minimum number of square tiles required to pave the floor of a room of 2m 50cm long and 1m 50cm broad ?**

**Ans: 4**

**Sol: **HCF of 250 cm and 150 cm is 50 cm, which is the side of the tile

So, the required number of tiles = (250 X 150) / (50X50) = 15

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