What is always in front of you but can’t be seen?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

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

How can you tell a raw egg from a hard-boiled egg?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

Using Only Five 5's and any mathematical operator make sum as 37

Can you count the number of blocks in the picture below?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?