What happened when the wheel was invented?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Can you find the dog hidden in a group of pandas?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

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?

Decode below rebus
D
N
A
T
S , D

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?