How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

What does the below rebus riddle means?

There is something which you can be arrested for attempting but not for successfully completing.

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Find the next number in the series below

21 32 54 87 131 ?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

Can you solve the photo plexer logic ?

What four weights can be used to balance from 1 to 30 pounds?