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?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

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

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

Imagine you are in a room with no windows or doors. How will you get out?

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