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

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

You can hear me, but you can't touch or see me.

What am I?

Which alphabet is a part of our body?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

Which country gets ill every time?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?