self Maths Puzzle


What is the remainder when 91+92+93+....+98 is divided by 6?

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self Other Question

You have teleported down to a hitherto unvisited planet, upon which you discover the following:

1. No two inhabitants have the same number of hairs on their head.
2. No inhabitant has exactly 518 hairs.
3. There are more inhabitants in town than hairs on any individual inhabitant's head.

What is the highest possible number of inhabitants?
If a man travels at speed of 20km/hr, he reaches the office 20 minutes late. If he travels at 30 km/hr, he reaches the office 15 minutes early. If he travels at a speed of 25 km/hr, then, when does he arrive at the office?