Which word does the below Plexor means ?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

The more you take me, the more you leave me behind.
Who Am I?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

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)?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

People make me, save me, change me, raise me. What am I?

In order to complete the racing competition, the Mexico racetrack has to submit its top and the most famous three horses to win the competition. Due to an electrical storm, all the records are cleared and no one knows which horse holds the record. They all look identical and it becomes even more difficult to differentiate the horses. There are 25 horses in the Mexico racetrack. But there can be only five horses at a time on the track. What will the least number of races that can be conducted to find out the three fastest horses?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

What is the fastest way to double your money?