Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Find the missing number in the sequence below:

Count the squares in the matchstick puzzle below?

What does an Island and the letter T have in common?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

Different lights make me strange by changing me into different sizes. What am I?

Spot what is wrong here in below Picture?

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 ?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?