Say you had the number 65,637 could you tell if it was divisible by 11 without actually dividing it ?
Yes, if the difference between the sum of the odd numbered digits (1st, 3rd, 5th...) and the sum of the even numbered digits (2nd, 4th...) is divisible by 11, then the number is divisible by 11.
What is the name for an object with 11 sides ? hendecagon
Long time nosee Stormy; I hope you are well and enjoying summer.
AKA undecagon or unidecagon
Who is gonna argue with that?
BTW What ya'll talking about?
Mark and TTH decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart.
One of them has a pet carrier pigeon (to save any embarrassment I will refrain from mentioning who) and it starts flying the instant they start peddling.
The pigeon flies back and forth at 18 MPH between the 2 friends until they meet.
How far does the pigeon travel