Find out the number of circles in the given picture having Illusion

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

What has one letter and starts with an E?

Find the next number in the series below

21 32 54 87 131 ?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Find the Goldfish below the given Image.

Can you name some countries which do not have the alphabet 'A' in them?