Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Solve below popular number sequence
314 159 265 358 979 323 846 ?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Can you start the fire using two pieces of wood?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

You see me once in June, twice in November, and not at all in May. What am I?

Move four matchsticks to the below square to form three squares?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

Can you find the company name in the pictogram below?

Rectify the following equality 101 - 102 = 1 by moving just one digit.