1 The approximate number of seconds in a year is 32,000,000. When this number is written in scientific notation, the numerical value of the exponent is

(1) 7        (3) 7
(2) 6          (4) 8

1         2         3         4        

2 Which expression must be added to 3x 7 to equal 0?

(1) 0                  (3) 3x 7
(2) 3x + 7          (4) 3x + 7

1         2         3         4        

3 What is the greatest possible number of points of intersection of a triangle  and a circle?

(1) 6       (3) 3
(2) 2       (4) 4

1         2         3         4        

4 A fair coin is tossed three times. What is the probability that the coin will land tails up on the second toss?

(1) 1/3       (3)2/3
(2) 1/2       (4)3/4

1         2         3         4        

5 There are 357 seniors in Harris High School. The ratio of boys to girls is 7:10. How many boys are in the senior class?

(1) 210      (3) 117
(2) 147      (4) 107

1         2         3         4