Find the next number in the sequence

5 12 24 36 ?

What is the next number?

77, 49, 36, 18 ?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

What can you hold in your right hand, but never in your left hand?

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

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 sides does a circle have?

Which number comes next in the number series?

2, 9, 30, 93, ?