There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

You can see three almost identical images below. Can you spot the odd one out from them?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Why is a river so rich ?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Find the missing number in the image below.

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

What kind of storm is always in a rush?