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

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

Which country gets ill every time?

A California farmer owns a beautiful pear tree. He supplies the fruit to a nearby grocery store. The store owner calls the farmer to see how much fruit is available for him to buy. The farmer knows the main trunk has 24 branches. Each branch has exactly 12 boughs and each bough has exactly 6 twigs. Since each twig bears one piece of fruit, how many plums will the farmer be able to deliver?

Can you count the number of blocks in the picture below?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Why Aeroplane windows are round?

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?