Why 1729 is a magic number? Answer Logically.

What does this below rebus puzzle mean?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

10+10 and 11+11 can give you the same answer.

Explain how?

I am sure no one can have two things for dinner. what are they?

Dwayne Johnson was running away with the loot from a heist in his car along with Vin Diesel. One tire was punctured and he dropped down to replace it. While changing the wheel, he dropped the four nuts that were holding the wheel and they fell into a drain. Vin Diesel gave him an idea using which they were able to drive till the rendezvous point.

What was the idea ?

Can you decipher the below rebus?

PBLUESAISNUERSES

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.