Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

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.

People make me, save me, change me, raise me. What am I?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

Different lights make me strange by changing me into different sizes. What am I?

Can you count the number of triangles in the picture below?