Why is the Hole below a Lock?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

what does the below math rebus puzzle mean?

Find the next number in the sequence

5 12 24 36 ?

Identify the 10 differences between the two given pictures.

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Which is faster, Heat or Cold ? Explain.

What kind of storm is always in a rush?

John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?