Number Sense

1). (1 point) What is 40% of 2000?



Answer:_________

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2). (1 point) Write down all the factors of 12 (including 1 and 12)



Answer:______________________

3). (2 points) What is the greatest common factor (GCF) of 51 and 85?



Answer:__________

4). (2 points) What is the least common multiple (LCM) of 18 and 24?



Answer: ________

5). (2 points) How many prime numbers are there between 30 and 50?



Answer: ________