Why 1729 is a magic number? Answer Logically.

Find the missing number in the sequence below:

I look at you, you look at me, I raise my right, you raise your left. What am I?

Complete the table series riddle by finding the number that can replace "??".

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

What number should come in place of the question mark below?

Find the last number in the series below:

voN luJ yaM raM ---

Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?