Which tank will fill first?

I travel all around the world but always stay in the corner. What am I?

How many times do a clock's hands overlap in a day ?

How many triangles are there on the puzzle below?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

What is harder to catch the faster you run?