I have teeth but i don't bite. Who Am I ?

How many times in a given day, minutes and hour clock comes in a straight line ?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

In the image given, you can find several triangles. Can you count them all?

What has many teeth, but cannot bite?