Replace the question mark with a numberMATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 69
The first user who solved this task is H Tav.
#brainteasers #math #riddles
William A. MitchellDied 26 Jul 2004 at age 92 (born 21 Oct 1911). American food scientist who invented Pop Rocks candy, Cool Whip, the orange drink mix Tang, and quick-set Jell-O Gelatin. He developed a tapioca substitute during WW II since tapioca itself was limited in supply. For 35 years, he worked worked as a chemist for General Foods Corp, and held more than 70 patents. Pop Rocks exploding candywas patented in 1956, but not marketed until 1975. Its novelty quickly caught the public's attention. It was an accidental discovery while experimenting to produce an instant soft drink. It is a hard candy manufactured by pressurizing carbon dioxide at 600 psi in a candy syrup at 150 °C. When cooled and solidified it traps small pockets of carbon dioxide that “explode” in a person's mouth.