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

My location can be determined by the below rebus.
So where am i ?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

With the help clues provided in the image, can you find the 5 digit key?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?

Find the hidden tiger in the given optical illusion ?