Top 7 Unique places in Goa for your next trip

Would you cool a bucket of water more quickly by placing it on ice or by placing ice in it ? Give reasons for your answer.

Can there be a unique equationof the plane passing through the points (4,3,5)(1,2,3) and (7,4,7) ? Give reason for your answer.

200 logs are stacked in such a way that there are 20 logs in the bottom row, 19 in the next row, 18 in the next row and so on. In how many rows, 200 logs are placed and how many logs are there in the top row?