This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

In a school, 280 students studied chemistry, 254 students studied physics and 280 students studied biology.

97 students studied chemistry as well as physics, 138 students studied physics as well as biology and 152 students studied chemistry as well as biology.

73 students studied all the three branches.

Can you find out the total number of students?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

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

The dirtier I get, the whiter I look. Who am I?

You need to move three matchsticks to form three squares. Can you do it?

Check out the number list below and find what number comes next in the sequence.

111 , 113 , 117 , 119 , 123 , 137 , ?

A father's child, a mother's child, yet no one's son.

Who am I?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?