Find the next number in the sequence

5 12 24 36 ?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?

How many Watermelons are there in the below picture?

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

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Can you make a six-letter word using the letters N, A and B ?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?