what does this below rebus represent identXQQQQQME

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Find the next number in the series below

21 32 54 87 131 ?

How many letters are in the alphabet?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

What does below rebus means ?

A man died and leaves Rs.10,000 in his will. There are 6 beneficiaries- his 3 sons and their wives. The 3 wives receive Rs.3960 of which Priyanka gets Rs.100 more than Tanu and Neha gets Rs.100 more than Priyanka.
Pramod gets twice as much as his wife, Tushar gets the same as his wife, and Prashant gets 50% more than his wife.

Who is married to whom?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?