You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

What word begins and ends with an E, but has only one letter?

Solve the rebus riddle in the picture below.

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

Why is the Hole below a Lock?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

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 ?

A gardener planted the Lemon trees in a mathematical ordered way (i.e. he planted a tree in rows).
He created a total of 19 rows of trees.

Note: There should be more than 2 trees to count as a row.

What is the minimum number of trees required by the gardener to have 19 rows of trees?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?