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

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Using Only Five 5's and any mathematical operator make sum as 37

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Akbar summoned Birbal out of anger.
He told him that he will have to face death.
He asked him to make a statement and if the statement is true he will be buried alive and if the statement is false, he will be thrown at lions.
After hearing Birbal’s statement, Akbar could do nothing but smile.
He gave him 5 gold bars and let him go.

What did Birbal say?