420

420 is the section number in the Indian Penal Code (enacted in 1860) that refers to the offense of cheating. Punishment for this cognizable offense is one to seven years in prison and/or a fine.

"420. Cheating and dishonestly inducing delivery of property.
Whoever cheats and thereby dishonestly induces the person deceived to deliver any property to any person, or to make, alter or destroy the whole or any part of a valuable security, or anything which is signed or sealed, and which is capable of being converted into a valuable security, shall be punished with imprisonment of either description for a term which may extend to seven years, and shall also be liable to fine."¹

At NJIT, the term 420-ing is often heard after physics and math exams, as in, "so and so were 420-ing so hard". Respective faculty departments have attempted to implement additional proctors and an updated Honor Code that stressed more responsibility in individuals. Residence Assistants and faculty hung posters with the new code on the walls throughout dormitory hallways and classrooms. Ironically, the bottom of each poster indicated that the code was heavily adapted from that of another university.

¹The Indian Penal Code. http://www.indialawinfo.com/bareacts/ipc.html.

This is a type of sailing dinghy which is sailed by two people. This particular boat comes in three forms. The International 420, the Club 420 and the Collegiate 420. The first is dead in the U.S. While the latter two are used exclusively in the U.S. The specifications for all of them are:

• Length: 13' 9"
• Beam: 5' 5"
• Draft: 3' 2"
• Sail Area: 110

The basic differences are: The International is the original. It is the lightest hull and was designed for performance and to be a trainer for the Olympic 470 class.

The Club came next. It made the hull heavier to give better durability. An untapered mast was also added to lower costs.

The Collegiate was adopted from the Club for use in college sailing. It is the same as the Club except for the fact that the trapeze and spinnaker were removed. This along with the FJ and Laser are the primary boats used in ICSA competitions.

The 420 is an excellent trainer for sailors aged 13-18 and is well established in junior sailing programs across the U.S. It serve as a good introduction to double-handed sailing as well as basic sail tuning.

In literature, apparently, the time 4:20 is a time for leaving, travelling, etc (Mark Twain), and Salmon Rushdie wrote in "Midnight's Children" that "420 has been, since time immemorial, the number associated with fraud, deception, and trickery."

It should also be noted that 4/20 was Adolf Hitler's birthday, as well as the date of the Columbine High School shootings.

And in the book "Jules et Jim" by Francois Truffaut, there is a line that says "angels always pass by at twenty minutes past the hour... at twenty minutes past and twenty minutes to the hour."

• date of first lab test
• number of psychoactive chemicals in weed
• politically significant

The series is made up by the smallest common multiple of the first n numbers, which is the smallest number that can be divided without a rest by the input numbers.

So
scm(1)=1
scm(1,2)=2
scm(1,2,3)=6
scm(1,2,3,4)=12, not 4*6=24, because 6 is already divisible by 2, 2*6=12 is divisible by 4
scm(1,2,3,4,5)=60
scm(1,2,3,4,5,6)=60, as 60 is already divisible by 6
scm(1,2,3,4,5,6,7)=420

Babylonian mathematics knew fractions, and there were cuneiform symbols for fractions, so one can imagine that the Babylonians liked to have numbers that could be evenly divided. So, they would like the 420.

btw. the smallest common multiple is to the gcd what, in the boolean algebra of logic, is the OR to the AND. However, there's no meaningful negation that would make the smallest common multiple and the gcd part of a boolean algebra.