Find the next number in the sequence

5 12 24 36 ?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Can you Find and name the hidden bird in the picture below ?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?