Solve the equation in the image by looking at the pattern closely.

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

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

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

What Does this text mean:

important=important

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?