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?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

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

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

An explorer goes on an exposition in the jungle. He sets up camp in the middle of the jungle. The next morning he sees something with a head and a tail, but he is not afraid. What did he see in his bag?

What does this rebus means ?

PROG WORKRESS

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

If 1+9+8=1, what is 2+8+9?