I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

The centre of the third figure is empty. What digit should fit inside?

Which letter of the alphabet has the most water?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

Can you find the key in the picture below?

Our product and our sum always give the same answer. Who are we?