Find the next number in the sequence

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

What building has the most stories?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

Find the next number in the series below

21 32 54 87 131 ?

What goes up but never comes down?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

In the given picture, in how many ways can you read the word "Tiger"?