Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Prove that the below maths equation is true.

8 + 8 = 91

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

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

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?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

I make two people out of one. What am I?