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

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

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?

I look at you, you look at me I raise my right, you raise your left. What am I?

One of the leprechaun is missing if you see the two pictures attached to this question. Where did he go? When he comes back, do you know where has he been?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

Eight of us go fourth, not back, to protect our king from an attack. What are we?