If 21x = 79x, what is the value of x?

Find the hidden panda in the image below.

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

What does this rebus riddle mean?

Can you find out who is the kidnapper in below Picture and why, Explain ?

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

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

If six children and two dogs were under an umbrella, how come none of them got wet?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

A sundial has the fewest moving parts of any timepiece. Which has the most?