If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What number divided by 4 is the same as that number minus 4?

Why do we preferably have round manhole covers and not square ones?

Can you count the number of matches in the picture below ?

John is found dead in his office at his desk. The police have narrowed the suspects down to three people: Mrs. Jacob, John’s wife Hena and his business partner Jason . All three visited John on the day of his murder, but all three provide the police with stories of explanation as to the reason for their visit.
Police found John with his wrist watch still on his right arm, a torn up picture of his wife laying on the floor beside the trash can, and an ink pen in his right hand. On the desk, the police found a name plate, a telephone that was off the hook, and a personal calendar turned to the July 5th page with 7B91011 written on it. After examining this evidence, the police knew their suspect. Who was it ?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

What Deficiency does the below rebus represent?

VIT_MIN

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?