q: What is the units digit of the expression 14^7−15^4?
Options:
(A)  0
(B)  8
(C)  4
(D)  6
(E)  3
a: I think answer on this one should be B too. Since we know that 14^7>15^4, as Will said one should always check if the number is positive. The answer is (B).
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q: Rs. 5000 is divided into three parts A, B and C. How much A is more than C if their ratio is 1/5:1/5:1/10?
Options:
(A) 1000
(B) 992
(C) 772
(D) 552
(E) 312
a: 1/5:1/5:1/10 = 2:2:1
1/5*5000 = 1000
2000-1000 = 1000 The answer is (A).
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q: A number is said to be prime saturated if the product of all the different positive prime factors of n is less than the square root of n. What is the greatest two digit prime saturated integer ?
Options:
(A) 99
(B) 98
(C) 97
(D) 96
(E) 95
a: A prime factors are 3 and 11. 33<sqrt(99)? no
B prime factors are 2 and 7. 14<sqrt(98)? no
C prime number. its sqrt is never greater than itself
D A prime factors are 2 and 6. 6<sqrt(96)? yes
E prime factors are 5 and 19. 45<sqrt(95)? no The answer is (D).
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q: Dick and Jane each saved $3,000 in 1989. In 1990 Dick saved 8 percent more than in 1989, and together he and Jane saved a total of $5,000. Approximately what percent less did Jane save in 1990 than in 1989?
Options:
(A) 8%
(B) 25%
(C) 41%
(D) 59%
(E) 70%
a:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Dick saved = $ 3240
Jane saved = $ 1760 (jane saved $1240 less than she did the prior year)
Jane saved approximately $1240/$3000 (close to 41%) less in 1990 The answer is (C).
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