What is the next number in this matchsticks series riddle?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

What work can one never finish?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

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

81 x 9 = 801. What must you do to make the this equation true?

If 21x = 79x, what is the value of x?

A California farmer owns a beautiful pear tree. He supplies the fruit to a nearby grocery store. The store owner calls the farmer to see how much fruit is available for him to buy. The farmer knows the main trunk has 24 branches. Each branch has exactly 12 boughs and each bough has exactly 6 twigs. Since each twig bears one piece of fruit, how many plums will the farmer be able to deliver?