Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

What is the largest number you can write with just 3 digits?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

I know a nine-letter word having only one vowel.
Do you ?

What does this rebus riddle means ?

How do you go from 98 to 720 using just one letter?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?