Why is Saturday stronger than Monday?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Rihana, Peeta, and Logan order a pizza for $10. Out of the three, Rihana and Peeta were quite hungry and ate 6 slices a piece, while Logan had just 2 slices.

Now, they want to split the cost among them fairly but due to the lack of change, they decide to round off the cost to the nearest possible dollar.

Can you find out the fairway which should be used to split the money?

What if the pizza was worth $11?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

What is next number in the pattern below:

131 517 192 123 ?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

Which is heavier: a ton of bricks or a ton of feathers?