Find the missing number in the sequence below:

Ten coins have been arranged as you can see in the given picture. In this arrangement, a triangle is formed pointing upwards. You have to invert the position of the triangle and make it point downwards while changing the position of 3 coins only. Can you do it?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

What is the coolest letter in the alphabet?

If 1+9+8=1, what is 2+8+9?

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

Which tank will fill first?

How can you leave a room with two legs and return with six legs?

Count the number of triangles in the picture below:

Replace the question mark with the number below given a simple math problem.