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?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

Can you place three balls such that the equation shown in the picture holds true?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

I cannot talk, but I always reply when spoken to. What am I?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?