You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Identify the hidden meaning behind this picture?

In the four images below, can you find the odd one out?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

I cannot talk, but I always reply when spoken to. What am I?

With the help clues provided in the image, can you find the 5 digit key?

Which is faster, Heat or Cold ? Explain.