If eleven plus two equals one, what does nine plus five equal?

why number 8549176320 is one of a kind?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

Count the number of squares in the picture below.

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?

Detective Rockford was jogging near the beach at 4:30 am.
He hears a sound near the shack "No Michael, Please Do not shoot me".
Next instance he heard the sound of gunfire. Rockford rushes to the shack where he finds women lying dead and a gun in close proximity of three "Doctore Lawyer and a Teacher".

Rockford immediately knew that the Lawyer has committed the crime. How?

What number divided by 4 is the same as that number minus 4?

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

O T T F F S S ?

Can you find out the total number of triangles in the given figure?