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

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

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

My location can be determined by the below rebus.
So where am i ?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

Why Aeroplane windows are round?

Can you divide the below-given shape into four equal and identical pieces?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?