What happened when the wheel was invented?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

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?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

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

When we see 2 but call 10?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Why do Chinese men eat more rice than Japanese men do ?

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven