Can you replace the question mark with the correct number in the below table sequence?

Which is faster, Heat or Cold ? Explain.

Can you count the number of lines in the below picture?

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

How can you take 2 from 5 and leave 4?

Find the next number in the sequence

5 12 24 36 ?

What type of tree can I carry in my hand?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?