What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

What is full of holes but still holds water?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Which tank will fill first?

When we see 2 but call 10?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.