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

What has many keys but can’t open a single lock?

Using eight eights and addition only, can you make 1000?

Which tank will fill first?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

Replace the question mark with the correct number in the below-given picture?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

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?

A newspaper is supposed to have 60 pages.Pages 14 and 21 are missing from the newspaper.

Can you tell me , Which other pages won't be there as well ?