What does an Island and the letter T have in common?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Why are all black people so quick ?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

Find out the missing number in the picture attached:

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Identify the 10 differences between the two given pictures.

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.