John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

Can you spot the hidden girl in the picture below?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

I know a nine-letter word having only one vowel.
Do you ?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

Why do you find that most of the buildings are deprived of the 13th floor?

Why are all black people so quick ?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Count the number of squares in the picture below.