If eleven plus two equals one, what does nine plus five equal?

Find the next number in the sequence

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

A pregnant woman is preparing to name her seventh child. Her children's names so far are Dominique, Regis, Michelle, Fawn, Sophie, and Lara. What will she name her next child -- Jessica, Katie, Abby or Tilly?

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

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

What is always in front of you but can’t be seen?

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

What has no start, end, or centre?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT