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

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

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

There is a bag which have 21 blue balls and 23 red balls. You also have 22 red balls outside the bag. Randomly remove two balls from the bag. * If they are of different colors, put the blue one back in the bag. * If they are the same colour, take them out and put a red ball back in the bag. Repeat this until only one ball remains in the bag. What is the color of the sole ball left in the bag ?

If EELS + MARK + BEST + WARY = EASY

What does HELP + BARK + WARD + LEAD equal?

You need to move three matchsticks to form three squares. Can you do it?

What came first, the chicken or the egg?

Which English verb becomes past tense just by rearranging the letters?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

What number comes next in this sequence:
7 8 5 5 3 4 4 _