How many triangles are there on the puzzle below?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

If we tie a Sheep to one peg, a circled grass is been eaten by the Sheep. If we tie the Sheep to two pegs with a circle on its neck, then an eclipse is eaten out of the grass by the Sheep. If we want an eclipse then we put two pegs and then put a rope in between them and the other end of the rope is tied up on the Sheep's neck.

How should we tie the peg and the Sheep so that a square is eaten out from the garden grass? We only have one Sheep rope and the peg and the rings.

What is the fastest way to double your money?

How can you make a TV, a bed, a dog, and a car liquid?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...