John was piloting a plane behind a car but was never able to overtake it. Why?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

How many triangles are there on the puzzle below?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

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?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?