Where do you go to learn how to make ice cream?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

What is the next shape from answers A, B, C, and D figure?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

Which country gets ill every time?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

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

What is always in front of you but can’t be seen?