Replace the question mark with the correct number below.

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.

What is next number in the pattern below:

131 517 192 123 ?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

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

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

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)?

Find the smallest sentence with all the English alphabet.

How can you write nineteen in a manner that if we take out one, it becomes twenty?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?