What four weights can be used to balance from 1 to 30 pounds?

Can you find out the remainder when 3^300 is divided by 5?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

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?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

Why Wine Glass Stem is so long?

A man dies of old age on his 25 birthday. How is this possible?

In which direction should the missing arrow point?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

When it is alive we sing, when it is dead we clap our hands. What is it?