Math Illusion: 2 = 1
The Numbers Riddle
Using only whole numbers, and starting with the number 1, to what number would you have to count before finding a number with the letter "a" in the spelling?
The F Illusion
How many Fs do you see in the text below?
FINISHED FILES ARE THE RE-
SULT OF YEARS OF SCIENTIF-
IC STUDY COMBINED WITH THE
EXPERIENCE OF YEARS.
What does the sign say?
Are you sure ?
