If you say my name, I will no longer exist. What am I?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Using eight eights and addition only, can you make 1000?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

Five teams were competing in cricket where they faced each other exactly once. After the tournament, the following is the point table.

DareDevils 6
SuperKings 5
Royals 4
Sunrisers 2
Riders ?

How many points did Riders end up with?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Find the hidden tiger in the given optical illusion ?