I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

What is the fastest way to double your money?

Why do you find that most of the buildings are deprived of the 13th floor?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

Can you identify if it's a murder or a suicide ?

What does this mathematical rebus means ?