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?

I am white when I am dirty, and black when I am clean. What am I?

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

How can I get the answer 24 by only using the numbers 8,8,3,3?

You can use the main signs add, subtract multiply and divide.

The king of Octopuses has servants who have six, seven or eight legs. The distinguishing characteristics of the servants is that the one with seven legs always lie but the one with either six or eight legs speak the truth always.

One day, four servants meet and converse:

The black one says, 'We have 28 legs altogether.'

The green one says, 'We have 27 legs altogether.'

The yellow one says, 'We have 26 legs altogether.'

The red one says, 'We have 25 legs altogether.'


Can you identify the colour of the servant who is speaking the truth?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Decode this picture on T-Shirt and tell what it says ?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

How can you tell a raw egg from a hard-boiled egg?

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

How is this possible?