Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

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

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Can you find the odd one out from the below words ?

First Second Third Forth Fifth Sixth Seventh, Eighth Nine Ten Eleven Twelve.

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

How can one talk without saying a single word?

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

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?