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?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Complete the table series riddle by finding the number that can replace "??".

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

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?

Find the next number in the series below.

6 18 270 72090 ?

Here is a Swiss Cross. You have to make two straight cuts in the figure so that it is divided into four congruent pieces. Also, you should be able to join these pieces into a square then. Can you accept this challenge?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?