what does the below rebus means?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

What happened when the wheel was invented?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

Decode the movie name from the below picture?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

There is a place where if I stand up straight, I will still be considered sideways.

Can you count the number of matches in the picture below ?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
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