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

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

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

A bomb exploded in a room full of married couples and no one died. How?

Can you find the thief by just looking at the picture below?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?