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 am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

What has many keys but can’t open a single lock?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

What does a man do only once in his lifetime, but women do once a year after they are 29?

What kind of tree can you carry in your hand?

what's the probability of getting a king or a queen from a pack of 52 cards?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3