Which is the rope you never skip with?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Why do we preferably have round manhole covers and not square ones?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

What does below rebus means ?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

12345 a famous South Indian actor
567 is a path in jumbled form
8 & 10 are same letters
9 is one among the first six alphabets.
WHO AM I?

Prove that the below maths equation is true.

8 + 8 = 91