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 Wine Glass Stem is so long?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

How can you leave a room with two legs and return with six legs?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?