A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Can you Find and name the hidden bird in the picture below ?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.