The more of this there is, the less you see. What is it?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

Give it food and it will live; give it water and it will die.

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

Can you solve the below geography rebus by decoding the below rebus ?

Can you find out the remainder when 3^300 is divided by 5?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?