Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

What makes this number unique: 8,549,176,320?

Replace the question mark with the correct number below.

What does this rebus means ?

PROG WORKRESS

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

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 does below pictogram mean?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Can you count the number of triangles in the picture below?