Can you find out which number multiplied by itself will give the output as 12345678987654321?

I am quite hot but become too cold if you remove the first two letters. What am I?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

A man is sitting in a bar when a rich man sits next to him. He turns to the rich man and says, “Did you know I know almost every song that has ever existed?”

The rich man laughs. The man then says, “I bet you all the money you have in your wallet that I can sing a genuine song with a lady’s name of your choice in it. The rich man laughs again and says, “OK, how about my daughter’s name, Jamie Armstrong-Miller?” Minutes later, the man collects his cash and the rich man goes home cashless. What song did the man sing?

Different lights make me strange by changing me into different sizes. What am I?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

What is full of holes but still holds water?