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

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

What is more useful when it is broken?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

A man is found dead with a knife in his back When the investigation is done. A chair lays beside him and the forensic team finds moisture around the body.

If he committed suicide, how did he do it?

What is the fastest way to double your money?

Find the number of squares in the below-given picture.

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?