Difficult Riddles

Can you solve it?

E + E + E = 15

E + C = 8

C + E + B = 10

B + C * J = ????

If 

111 = 13

112 = 24

113 = 35

114 = 46

115 = 57

Then

116 = .....???

The more of this there is, the less you see. 

What is it?

Figure out how many trailing zeroes are in 1000! 

Which 3-letter word can be inserted into all four lines above to form complete words?

P_ _ _ N T

D E _ _ _ S T

S T _ _ _

C _ _ _ E R

What goes up but never comes down?

What am I?

Think of a number

Step 1: Multiply it by 3

Step 2: Add 6

Step 3: Divide by 3

Step 4: Subtract the number chosen in step one from the answer in step 4.

What is the answer?

Guess what comes next in the sequence:

1 2 3 4 5 ? 

The answer is not 6. What is the answer?

Where does Friday come before Thursday?

What has one eye but can’t see?