What will be the missing number?
Solve this number puzzle. What will be the missing number? (6, 15, 28, 45, ??)Correct answers: 179
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
Laser patentIn 1967, a U.S. patent for "Ruby Laser Systems" was issued to Theodore Maiman (No. 3,353,115), for which he had applied on 13 Apr 1961. He had first operated a laser based on a ruby crystal on 16 May 1960, at Hughes Research Laboratories in Malibu, California. |