I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Can you count the number of squares in the figure below?

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.