2. What is the first term of an Arithmetic Progression in which the common difference
is -2 and the 48th term is 16 ?
3. Find the sum of the first 20 terms of an Arithmetic Progression in which the first term
is 2.5 and the common difference is .75 .
4. List all PAIRS of factors of 240.
5. List all possible factors of 847.
6. Without using a calculator, decide whether or not 75 is a factor of the
product: (2)(25)(17)(21)(23)(29):
7. Write 34,875 as a product of primes.
8. What is GCF(363, 605) ?
9. What is GCF(60, 630 , 750) ?
10. What is LCM(24, 42) ?
11. What is LCM(8, 25 , 36 ) ?
12. What is the SMALLEST natural number that is divisible by 7, 8, 9, 10, 11 and 12?
13. What is the LARGEST three-digit prime whose digits are
also primes?
14. Jupiter and Saturn are now "lined up." If it takes Jupiter 12 years to orbit the Sun,
and Saturn takes 30 years, when will be the first time that they will be aligned again?