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

Spot what is wrong here in below Picture?

Find the next number in the following series:
6, 14, 26, 98, __?

What goes up but never comes down?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

Find the number of squares in the below-given picture.

I have Rs.50 and I spend it in the way as below.

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Can you solve the maths in the below-given picture equation?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL