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- In the geometrics sequence (9, 18, 36, 72) where b1=9, what is the value of b12?
- What is the average of 4x+5, 7x-6, and 8x+2?
- Lenny’s average score after 3 tests is 88. What score on the 4th test would bring his average up to 90?
- An agent receives a commission of 40 cents for every $50 of business she procures. What percent is the agent’s commission?
(A) 0.8%
(B) 1.0%
(C) 1.25%
(D) 1.5%
(E) 2.5%5. What is z if 2.5% of z equals 75% of 50?
(A) 10
(B) 25
(C) 50
(D) 75
(E) 1500 - Given the series 2, 5,8,11, what is the 12th term of this sequence?
1500
Now, (2.5/100) z = (75/100) 50. So, z = (75/2.5) 50 = (750/25) 50 = 1500.
Alternatively, 75 is 30 times 2.5. So, z must be 30 times 50.
Of the given options, only 1500 is large enough.
To save time, you can sometimes guess the answer without doing detailed computations.
- Given the series, , , , …, what is the 10th term of this sequence?
- Mindy’s average monthly salary for the first 4 months she worked was $300. What must her average salary for the next 8 months be so that her average monthly salary for the year is $350?
(A) $400
(B) $380
(C) $390
(D) $375
(E) $370
- Andrew drove 100 miles at an average speed of 50 mph He then increased his speed by 20% and drove another 30 miles. What was the average speed for the entire journey?
- 4/7 of professors are male. The ratio of tenured: untenured is 2:5. If 1/5 of male professors are tenured, what fraction of female professors are untenured?
(A) 1/7
(B) 1/3
(C) 2/5
(D) 3/5
(E) 2/3
- If increasing 20 by P percent gives the same result as decreasing 60 by P percent, what is P percent of 70?
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Bergen county in home tutoring, SAT Classes, ACT Classes
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