Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

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

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

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

How many times can you subtract the number 5 from 25?

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?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

What is so fragile that saying its name breaks it?