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

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Move three sticks of the spiral below to form a square.

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

When can we add 2 to 11 and get 1 as the correct answer?

What does an Island and the letter T have in common?

How many times can you subtract the number 5 from 25?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?