No. The LCM of 21 70 and 87 is 6,090.
21-87 - 1964 is rated/received certificates of: Singapore:PG13
The GCF is 3.
Jeopardy - 1984 21-87 was released on: USA: 4 January 2005
87 ÷ 4 = 21 remainder 3
47 is a prime number 21 & 87 divisible by 3, and 4 is divisible by 2
21. 87,000,000,000,000,000,000,000
There are several possible sequences such as 87 86 43 42 (subtract 1, divide by 2) - next would be 21 20 87 65 43 21 (subtract 22) - followed by (-1)
The Tonight Show with Jay Leno - 1992 21-87 was released on: USA: 5 February 2013
The Tonight Show with Jay Leno - 1992 21-87 is rated/received certificates of: USA:TV-14
87/21 - 73/21 = 14/21 = 2/3
The GCF is 3.