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?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Can you decipher the below rebus?

PBLUESAISNUERSES

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

What is the word or phrase?

What is the next number in this matchsticks series riddle?

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?

Which five letter word can be added at the end of below word to form a
valid word?

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Here is a mathematical expression that also secretly tells a movie name. What movie is that?