Can you place six X (crosses) in below board without making three in a row in any way ?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

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

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

The more it dries, the wetter it becomes. Can you tell what it is?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

Solve this riddle by finding the odd one out from the rest.