- 能力倾向有用资源
- 能力倾向 - 问答
连锁规则 - 在线测验
以下测验提供了与连锁规则相关的多项选择题 (MCQ)。您需要阅读所有给定的答案,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。您可以使用下一道题按钮在测验中查看新的一组问题。
答案:A
解释
15 buffaloes = 21 cows ⇒ 1 buffalo = 21/15 cows = 7/5 cows ⇒35 buffaloes = (35 * 7/5 ) cows = 49 cows.
答案:B
解释
Let the required number of days be x. More men , less days (Indirect) 20 : 16 :: 30 : x⇒ 20x = (16 *30 ) ⇒ x = (16*30)/20 =24days.
问题 3 - 8 个男人可以在 12 天内完成一项工作;4 个女人可以在 48 天内完成这项工作,10 个孩子可以在 24 天内完成这项工作。10 个男人、4 个女人和 10 个孩子需要多少天才能完成这项工作?
答案:D
解释
1 man can complete the work in ( 12 * 8) = 96 days. 1 women can complete the work in ( 48 * 4) = 192 days. 1 child can complete the work in ( 24 * 10) = 240 days. 1 men 1 days work = 1/96, 1 women1 days work = 1/192. 1 child 1 days work = 1/240. ( 10 men + 4 women + 10 children) 1 days work = ( 10/ 96 + 4/192 + 10/240) = (5/48 + 1 /48 + 1/24) = 8/48 = 1/6. ∴ They will do the work in 6 days.
问题 4 - 一个男人和一个男孩一起工作可以在 24 天内完成一项工作。如果最后 6 天只有男人一个人工作,那么这项工作将在 26 天内完成。男孩独自完成这项工作需要多长时间?
答案:A
解释
Let 1 men 1 days work be 1/x and 1 boy 1 days work be 1/y Then, 1/x + 1/y = 1/24 20/x + 20 / y + 6 /x )1 ⇒ 20 (1/x + 1/y) + 6/x = 1 ⇒ (20 * 24) + 6/x = 1 ⇒ 6/x = (1- 20/24) = 4 / 24 = 1/6 ⇒ 1/x = 1/ 36 ⇒ 1/y = ( 1/24 - 1/ 36 ) = 1/72. ∴ The boy along will do it in 72 days.
答案:A
解释
Let the required number of persons be x . More work, more persons (direct) More days , less persons (Indirect) Work 1:2 :: 2 : (2+x) Days 12:9 1*12 * ( 2 + x ) = (2 * 9 *2 ) ⇒ ( 2 + x ) = 36/12 = 3 ⇒ x=1.
问题 6 - 一名承包商承诺在 50 天内建造一堵墙。他为此雇用了 50 个人。然而,25 天后,他发现只有 40% 的工作完成。为了按时完成工作,他需要额外雇佣多少人?
答案:B
解释
Work done = 40/100 = 2/5 , Remaining work = ( 1 - 2/5 ) = 3/5. 2/5 work is done in 25 days by 50 people. 3/5 work will be done in 25 days by (50 * 5/ 2 * 3/5) people = 75 people. Required number of people = ( 75 ? 50 ) = 25.
问题 7 - 以相同的恒定速度,6 台相同的机器每分钟可以生产 2700 个瓶子。以这个速度,10 台这样的机器在 4 分钟内可以生产多少个瓶子?
答案:B
解释
Let the required number of bottles be x . More machines, more bottles ( Direct) More time, more bottles ( Direct) Machines 6 : 10 :: 2700 : x Time 1:4 (6 * 1 * x) = 10 * 4 * 2700 ) ⇒ 10 * 4 * 2700 / 6 = 1800 bottles.
答案:D
解释
Let the required number of days be x. More persons, more days (Direct) Less rice, less days (Indirect) Persons 30 : 42 :: 15 : x Quantity 144 : 48 ∴ ( 30 * 144 * x ) = ( 42 * 48 *15 ) ⇒ x = 42 * 48 * 15/ 30 * 144 = 7 days
问题 9 - 一名承包商雇用了 30 个人在 38 天内完成一项工作。25 天后,他额外雇用了 5 个人,并且工作提前一天完成。如果他没有雇用额外的人,他将会落后多少天?
答案:A
解释
After 25 days , 35 men finish the remaining work in (38 - 25 - 1) = 12 days. 35 men can finish the remaining work in 12 days. 30 men can finish it in (12 * 35) /30 days = 14 days , i.e. 1 day behind.
答案:B
解释
Work done = 1/3, Remaining work = (1- 1/3 ) = 2/3 Let the number of additional men be x. More work, more men (Direct) More days , less men (Indirect) Work 1/3 : 2 /3 :: 20 : (20 +x) Days 25:20 1/3 * 25 * ( 20 + x) = 2 /3 * 20 *20 ⇒ (20 +x) = 32 ⇒ x=12. Required number of days = 12.
aptitude_chain_rules.htm
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