If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

With the help clues provided in the image, can you find the 5 digit key?

How many triangles can you count in the figure given?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

There was a blind beggar living on the footpath of a street. Suddenly one day, the beggar's brother died. What was the relation of the blind beggar with the person who died?

PS: Brother is not the answer.

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

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?