Below rebus represent famous DiCaprio movie. Can you name it?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

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

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Forwards I am heavy, backward I am not. What am I?