If 3a=b and 3c=d,then bd=
A. 3ac
B. 3a+c
C. 6a+c
D. 9ac
E. 9a+c
【B19】
A. common
B. low
C. prevalent
D. rare
What is the measure of the angle formed by the minute and hour hands of a clock at 1:50？
A. 90°
B. 95°
C. 105°
D. 115°
E. 120°
Which of the following CANNOT be expressed as the sum of three consecutive integers？
A. 18
B. 24
C. 28
D. 33
E. 36
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