- 能力倾向有用资源
- 能力倾向 - 问答
能力倾向 - 比例在线测验
以下测验提供与比例相关的多项选择题 (MCQ)。您需要阅读所有给出的答案,然后点击正确的答案。如果您不确定答案,可以使用显示答案按钮检查答案。您可以使用下一组测验按钮在测验中查看新的一组问题。
答案:C
解释
Let the number of boys and girls be x and y respectively. Then (x-y) = 16% of (x+y) (x-y)= 4/25(x+y) 25x-25y = 4x+4y =>21x = 29y x/y = 29/21 =>x:y = 29:21
答案:A
解释
A/C = (a/b *b/c) = (2/3*4/5 ) = 8/15 C/A =15/8 , so C:A = 15:8
答案:B
解释
2A =3B thus A/B=3/2 and 4B=5C thus B/C = 5/4 ∴ A/C=(A/B*B/C) = (3/2*5/4) = 15/8 A:C =15:8.
答案:C
解释
Let the numbers be 3x and 4x. At that point, 3x+6/4x+6 = 4/5 => 5 (3x+6) =4 (4x+6) => x=(30-24) =6 Contrast between the numbers = (4x-3x) = x = 6.
问题 6 - An 和 B 的收入比例为 8:9,如果 An 的收入增加一半,而 B 的收入减少 25%,他们新的收入比例为 16:9,An 的收入是多少?
答案:D
解释
New earnings of A and B=Rs (150% of 8x), Rs (75%of 9x) =Rs (150/100*8x), Rs (75/100*9x) = Rs 12x,Rs 27x/4 Ratio of new earnings = 12x: 27x/4 = 48:27 = 16:9. Thus, we cannot find A's earnings.
答案:C
解释
Let the numbers be x and y. Then, Y+ 20x/100 = (150/100)y => x/5 ={ (3/2)y-y}= y/2 => 2x-5y => x/y=5/2 => x:y =5:2
问题 8 - 当给定的两个数中每个数都加 1 时,它们的比例变成 3:4;当每个数都减去 5 时,它们的比例变成 7:10。这两个数是多少?
答案:C
解释
Let two number be x and y. Then, X+1/y+1=3/4 => 4x +4 = 3y+ 3 => 3y- 4x = 1 x-5/y-5=7/10 =>10x ? 50 = 7 ? 35 =>7y-10x = -15 Multiplying (i) by 5, (ii) by 2 and subtracting, we get Y=35. Putting y = 35 in (i), we get 4x =104 => x=26.
问题 9 - 将一些钱分给 A、B 和 C,使得 5 倍 A 的份额、3 倍 B 的份额和 2 倍 C 的份额都相等。A、B 和 C 的份额之间的比例是多少?
答案:D
解释
Let 5A= 3B= 2C=k. Then, A = k/5, B = k/3 and C = k/2 ∴ A:B:C =k/5 :k/3:k/2 =6:10:15.
问题 10 - 两个相同的玻璃杯分别装有 1/3 和 1/4 的牛奶。然后用清水将它们装满,并将混合物倒入一个杯子里。杯子里牛奶和水的比例是多少?
答案:B
解释
First glass contains milk =1/3, water=2/3. Second contains milk =1/4,water=3/4. New tumbler contains milk=(1/3+1/4)=7/12,water=(2/3+3/4)=17/12. Ratio of milk and water in it =7/12:7/12=7:17.
aptitude_ratios.htm
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