How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

During an interview, the interviewer ordered hot coffee for the candidate to relieve the stress. The coffee was kept before him. After a minute, the interviewer asked him, 'What is before you?' He replied 'Tea'.

The candidate was selected immediately. Why?

What has a bottom at the top?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

When we see 2 but call 10?

Buy me, smell me or deliver me, I do not change.

Who am I?