2008 Junior High
Math Field Day
Mad Hatter 8
1)
The
average temperatures for five days were 82˚, 86˚, 91˚, 79˚,
and 91˚. What is the mode for these temperatures?
A. 12˚ B. 91˚ C. 82˚ D. 86˚
2)
If -2x +
5 = 2 - (5 - 2x), what is the value of x?
A. no solution B. 2 C. -2 D. ½
3)
$390 is
13% of the total sum of money in a bank account. How much money is in the bank
account?
A. $6,000 B. $3,000 C. $1,057 D. $557
4)
Jane has
walked m miles. After a rest she walked another n miles. If Jane always walked
s steps per mile, then how many steps did Jane take?
A. s + m + n B.
sm C. s(m+n)
D. (s + m)n
5) The
test scores for the algebra test were 82, 74, 90, 68, 90, and 78. What was the
median of these test scores?
A. 76 B. 78 C. 80 D. 82
6)
Refer to
the previous problem. What was the range of those test scores?
A. 22 B. 54 C. 68 D. 80
7) Which
ordered pair is a solution of the following linear equations?
8x - 4y = 12
3x – y = 6
A. (-6, 0) B. (3, 3) C. (-1, 2) D. (-9, 0)
8)
What is
the area of a semicircle with a diameter of 15?
A. 15π B. 7.5π C. 225π D. 28.125π
9)
Joyce
has 10 fewer than twice the number of pens Emily has. If j represents the
number of Joyce’s pens and e represents the number of Emily’s pens, which of
the following is a correct equation relating j and e?
A. j = 2e-
10 B. j = 2(e - 10) C. j = 10 – 2e D. j = 2(10 - e)
10)
How many
primes are there between 89 and 100?
A. 1 B. 2 C. 3 D. 4
11)
A
certain neon sign flashes every 2 seconds, another sign flashes every 3
seconds, and a third flashes every 5 seconds. If they all start flashing
together, how many seconds will pass before they all flash simultaneously
again?
A. 45 sec B. 30 sec C. 20 sec D. 15 sec
12)
Tom can
make 6 baskets in the time that Simon can make 5 baskets, how many baskets can
Simon make when Tom makes 30 baskets?
A. 25 B. 24 C. 20 D. 28
13) Marianne can read at a rate of 300 words per
minute. While taking a speed reading course, Marianne increases her speed by 13
words per minute. After finishing the course, Marianne's speed drops by 100
words per minute. What percent of her original speed is her current speed?
A. 71% B. 72% C. 73% D. 74%
14) Where is y-intercept of this line: 3x + 5y =
15?
A. (3,0) B. (0,3) C. (5,0) D. (0,5)
15) If 0 < a and b < 0, which of the
following must be true?
A. a + b = 0 B. a/b < 0 C. a + b < 0 D. a + b > 0