Count the number of triangles in the below picture?

No matter how little or how much you use me, you change me every month. What am I?

why number 8549176320 is one of a kind?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

What is the riddle which can be asked all day with a different correct answer each time.

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

A sundial has the fewest moving parts of any timepiece. Which has the most?