1. Researchers at Massachusetts Institute of Technology (MIT) say  it with confidence that you cannot say this phrase 10 times fast.And by fast they mean real fast

"Pad kid poured curd pulled cod"

    “If anyone can say this 10 times quickly, they get a prize,” said the confident inventors in 166th Acoustical Society of America in San Francisco last week.

2. We are sure you did well in our first challenge.

Need some more?

Try this!

“I saw Susie sitting in a shoe shine shop.

Where she sits she shines, and where she shines she sits.”

3. Ask it someone 10 times maybe?

“How can a clam cram in a clean cream can?”

4. 

“The sixth sick sheik's sixth sheep's sick.”

5. A confusing question or a tongue twister? 

“Peter Piper picked a peck of pickled peppers.

A peck of pickled peppers Peter Piper picked.

If Peter Piper picked a peck of pickled peppers, 

where’s the peck of pickled peppers Peter Piper picked?”

6.  T and C are referred as most difficult words to pronounce fast and repeatedly.

“Two tried and true tridents”

7.       

“Through three cheese trees three free fleas flew.

While these fleas flew, freezy breeze blew.

Freezy breeze made these three trees freeze.

Freezy trees made these trees' cheese freeze.

That's what made these three free fleas sneeze.”

8. They sound tasty

“Freshly-fried flying fish.”

9.  

“She sells seashells by the sea shore.”

10. Here is our last one!

Try it out!

“Black background, brown background.”

Do tell us how much were you able to say 10 times fast and repeatedly?