Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Rearrange the letters in "new door" to make one word.

Can you count the number of triangles inside a triangle?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

Can you find the 09 errors in the picture below?

What does this Rebus Picture mean?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?