What is the next shape from answers A, B, C, and D figure?

Keyboard words are not in alphabetical order, Why?

Prove that twice of ten is the same as twice of eleven.

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What is the next number in the series?

15 29 56 108 208 ?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

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

Explain how?

What Adam and Eve do not have but the rest of the people have?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes