Why 1729 is a magic number? Answer Logically.

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

How do you go from 98 to 720 using just one letter?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

What is the next shape from answers A, B, C, and D figure?

If 21x = 79x, what is the value of x?

Who has married many women but was never married?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?