If a, b, and c are positive prime numbers, in the equation a – b = c, either b or c must represent which number?
(A) 13
(B) 11
(C) 7
(D) 5
(E) 2
3x3·2x2y·4x2y is equivalent to:
(A) 9x7y2 (B) 9x12y2 (C) 24x7y2 (D) 24x12y (E) 24x12y2
Correct Answer: C
Nita, Craig, and Chris catch a total of 300 fish on their trip. If Chris catches 45% of the fish and Craig catches 25 fish, what fraction of the 300 fish does Nita catch?
(A) 
(B) 
(C) 
(D) 
(E) 
Correct Answer: D
When f(a) = a2 + 2a + 5, what is the value of f(a + b)?
（A）a2 + b2 + 2ab + 5 （B） a2 + b2 + 2a + 2b + 10 （C） a2 + b2 + 2a + 2b + 5 （D） (a + b)2 + a + b + 5 （E） (a + b)2 + 2a + 2b + 5
Correct Answer: E
More ACT Math Exam Questions
- 1
For all negative even integers x, which of the following is a correct ordering of the terms x, xx, ((–x)!)x, and ((–x)!)(–x)!?
- 2Ansgar is writing a novel. He writes seven days a week. On each of those days he writes for at least 4 hours but never more than 8 hours. Last week, he wrote for exactly 46 hours. What is the maximum number of days on which he could have written for 8 hours?
- 3
Whenever x and y are both integers, what is (6.0 × 10x)(5.0y × 10y)expressed in scientific notation?
- 4When you multiply a number by 4 and then subtract 7, the result is the same as if you first subtracted 7 from the same number and then multiplied by 11. What is the number?
- 5A sensor records a piece of data every .0000000038 seconds. The sensor will record 100,000,000,000 pieces of data in how many seconds?