A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

What do you answer even though it never asks you questions?

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

What is the next number in this matchsticks series riddle?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Find the missing letter in the last circle logically in the given below picture.

Three cars are driving on a track that forms a perfect circle and is wide enough that multiple cars can pass anytime. The car that is leading in the race right now is driving at 55 MPH and the car that is trailing at the last is going at 45 MPH. The car that is in the middle is somewhere between these two speeds.
Right now, you can assume that there is a distance of x miles between the leading car and the middle car and x miles between the middle car and the last car and also, x is not equal to 0 or 1.
The cars maintain their speed till the leading car catches up with the last car and then every car stops. In this scenario, do you think of any point when the distance between any two pairs will again be x miles i.e. the pairs will be x distance apart at the same time ?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

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

Can you find the number?

Count the squares in the matchstick puzzle below?