What work can one never finish?

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?

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

When it is alive we sing, when it is dead we clap our hands. What is it?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

How is the moon similar to a dollar?

Identify the hidden meaning behind this picture?

Decode the movie name from the below picture?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211