What English word has three consecutive double letters?

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

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

Different lights make me strange by changing me into different sizes. What am I?

What has a bottom at the top?

What is so fragile that saying its name breaks it?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

What does below Rebus mean ?

esgg sgeg gegs gsge