Find the next number in the sequence

5 12 24 36 ?

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

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What has many keys but can’t open a single lock?

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.

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

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?

A blonde put eyeliner on her head. Why?

Replace the question mark with the correct number.