Why 1729 is a magic number? Answer Logically.

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

How many triangles are there on the puzzle below?

What do you answer even though it never asks you questions?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Which English verb becomes past tense just by rearranging the letters?

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?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?