If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

An inspection by the superintendent of St. Joseph School was scheduled on the next day. The class teacher Jenifer knew that he would be asking questions from her class and she would have to choose a pupil to answer. To offer a perfect impression over him, the teacher explained certain instructions to the students to maximise the chances of getting correct answer every time.

What did she say to the students?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

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

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

What is the next number in the series?

15 29 56 108 208 ?

You see me once in June, twice in November, and not at all in May. What am I?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?