What is the largest palindro...
What is the largest palindromic number less than 1000000 and divisible by 5?Correct answers: 60
The first user who solved this task is Allen Wager.
#brainteasers #math #riddles
Colour printing pressIn 1844, the first U.S. patent was issued for a printing press with different colours of ink applied in one impression (No. 3,744). The inventor, Thomas F. Adams of Philadelphia, Pa., called it "polychrome printing." The process used several ink fountains feeding different colour rollers which operated in parallel on the same axle, to produce stripes of different colours to ink corresponding lines of type. |