Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

The dirtier I get, the whiter I look. Who am I?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

On the occasion of Diwali, online seller companies in India are offering a big discount on Iphone14 as below.

: Flipkart offers a Flat 65% discount
: Amazon offers a 10% discount over and over again.
: Shopclues offers RS.45,000 off.

If the original cost of the iPhone is Rs.70,000 Which is the best offer for you?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.