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

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Take away the whole and some still remain. What is it?

Two Twins Jack and Jill were standing back to back and suddenly they started running in opposite direction for 4 kilometres and then turn to left and run for another 3 kilometres.

what is the distance between the Baggio twins when they stop ?

What is the Surname of Barbie Doll?

Why are televisions attracted to people?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?