The set of numbers that begin with the number 1 is Natural Numbers.
24017604
Modern numbers are called Arabic numbers, so.....
No
Modern marketing began in the early 1900s.
Niger is country code +227. Landline numbers begin with +227 20. Fixed wireless numbers begin with +227 21. Mobile numbers begin with +227 9.
The NHL's modern era began in 1992.
This question cannot be answered because an infinite quantity of prime numbers begin with a nine.
Investigation
1896
Add "+65" and then the phone number behind. Singapore phone numbers are 8-digit, and office/home numbers begin with 6, mobile numbers begin with 9, and the newer mobile numbers, 8.
Kansas