By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

If 21x = 79x, what is the value of x?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

Which is faster, Heat or Cold ? Explain.

You can hear me, but you can't touch or see me.

What am I?

Solve the alphametic puzzle by replacing the alphabet with the number.

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