One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

What is the next number in this series?

4,12,84,3612....

What four weights can be used to balance from 1 to 30 pounds?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

John bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.

The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.

Can you find the possible reason?

I have teeth but i don't bite. Who Am I ?

What is the fastest way to double your money?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?