What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Can you find out the total number of triangles in the given figure?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

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

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

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?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?