Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Replace the question mark with the number below given a simple math problem.

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

With the help clues provided in the image, can you find the 5 digit key?

You can hear me, but you can't touch or see me.

What am I?

81 x 9 = 801. What must you do to make the this equation true?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Can you solve the below tricky visual equation?

Why 1729 is a magic number? Answer Logically.