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

To tease, King Akbar told his most clever advisor Birbal to give his daughter one thing that she can eat when hungry, drink if she feels thirsty and can burn if she feels cold. King Akbar was shocked when Birbal gave Akbar's daughter one such thing that satisfies all of the above.

What did Birbal give to Akbar's daughter?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

Bay of Bengal is in which state?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?