Find the next number in the sequence

1, 2, 6, 21, 88, __?

What does does this rebus picture means ?

What's the best place to go shopping in the ocean?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Can you identify if it's a murder or a suicide ?