HIGHLINE SCHOOL DISTRICT
MATH OLYMPIAD
SECOND YEAR COMPETITION
March 22,1997



Number Sense

School: _________________

Grade: __________________

Team Number: ___________


1). (4 points) What is the next number in this sequence? 

 81    27     9     3     1       ____
2). (4 points) What is the least common multiple (LCM) of 12 and 30?



Answer:_________

3). (4 points) My sister is a 9th grader at Evergreen High. There are 250 students in her 9th grade class. The 10th grade is 20% larger than the 9th, and the 11th grade is 30% larger than the 10th. There are 1200 students at Evergreen. How many are in 12th grade?



Answer: ________________

4). (4 points) I started with 1/4 and added the same number to the numerator and also to the denominator. When I reduced my result, I had 3/4. What is the number I added?



Answer: ________________

5). (4 points) How many positive, perfect squares are less than 10,000?

Answer: ________________