What has a ring but no finger?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

In the picture given below, can you find out which digit will take place of the question mark?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Find the missing number in the image below.

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS