How many triangles can you find in this given picture?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

What is the next number in this series?

4,12,84,3612....

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.