266 MCGRAW-HILL’S SAT
- If the 30 students in Ms. Harkin’s class scored an
average of 80% on their final exams, and if the 20
students in Ms. Johnson’s class scored an aver-
age of 70% on their final exams, what was the av-
erage score for the two classes combined?
(A) 74%
(B) 75%
(C) 76%
(D) 77%
(E) 78% - What is the least positive integer m such that
168 mis the square of an integer?
SAT Practice 8:CheckingYour Work
Check your work carefully before choosing your an-
swer to the following questions.- If 3x– 5 = 20, what is the value of 3x+ 5?
- If s^2 – 1 = 2s– 1 , which of the following gives all
possible values of s^2?
(A) 2 only
(B) 4 only
(C) 0 and 2 only
(D) 0 and 4 only
(E) All even integers - Last year, Tom was twice as old as Julio. This
year, the sum of their ages is 65. How old is Tom
now?
(A) 22
(B) 32
(C) 41
(D) 42
(E) 43
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