What four weights can be used to balance from 1 to 30 pounds?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

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?

John was piloting a plane behind a car but was never able to overtake it. Why?

What happened when the wheel was invented?

I have thought of a number that is made up by using all the ten digits just once. Here are a few clues for you to guess my number:

First digits is divisible by 1.
First two digits are divisible by 2.
First three digits are divisible by 3.
First four digits are divisible by 4.
First five digits are divisible by 5.
First six digits are divisible by 6.
First seven digits are divisible by 7.
First eight digits are divisible by 8.
First nine digits are divisible by 9.
The number is divisible by 10.

Can you find out the number ?

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

The answer I give is yes, but what I mean is no. What was the question?