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AditiDeokar
Joined: 12 Jan 2025
Last visit: 21 May 2026
Posts: 86
Given Kudos: 298
Location: India
Concentration: Finance
Schools: NUS ESSEC MiM '26 ESSEC MiF '26 INSEAD MiM '26 ESADE Imperial ISB '26 ESADE HEC Sept '26 IE INSEAD Jan '26
GMAT Focus 1: 525 Q77 V77 DI74 
GPA: 3.5
Schools: NUS ESSEC MiM '26 ESSEC MiF '26 INSEAD MiM '26 ESADE Imperial ISB '26 ESADE HEC Sept '26 IE INSEAD Jan '26
GMAT Focus 1: 525 Q77 V77 DI74
Posts: 86
24 Dec 2025, 01:41
Kudos
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The answer is choice D. - 7 mins. This is a work Rates Problem, 12 Jedi's or J's can destroy 120 droids in one minute, while 4 Padawans can destroy 20 droids per minute. In the first Minute 120 droids are destroyed, in the second minute there are 8 J's and 4P's combined total of 100 droids destroyed, subsequently keep subtracting from the total droids destroyed )720) after each minute , once all J's have retreated it will take 12 P's 7 minutes to destroy the remaining 420 droids, hence answer is 7 mins.
24 Dec 2025, 01:46
Kudos
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In the first minute: 12 Jedi * 10 droids per minute = 120
In the second minute: (4 Jedi retreat at the end of the first minute, so 8 Jedi and 4 Padawans, each Padawan can destroy 5 droids per minute) 8*10 + 4*5 = 100
In the third minute: (4 Jedi and 8 Padawans) 4*10 + 8*5 = 80
After the third minute: (0 Jedi and 12 Padawans) 720 - 120 - 100 - 80 = 420 droids left. Time taken is \(\frac{420}{12*5}=7\)
Option D, 7 minutes.
In the second minute: (4 Jedi retreat at the end of the first minute, so 8 Jedi and 4 Padawans, each Padawan can destroy 5 droids per minute) 8*10 + 4*5 = 100
In the third minute: (4 Jedi and 8 Padawans) 4*10 + 8*5 = 80
After the third minute: (0 Jedi and 12 Padawans) 720 - 120 - 100 - 80 = 420 droids left. Time taken is \(\frac{420}{12*5}=7\)
Option D, 7 minutes.
Bunuel
24 Dec 2025, 02:15
Kudos
Bookmarks
Each Jedi can destroy 10 droids per minute.
At the end of each minute, four Jedi retreat and are replaced by four Padawans, each of whom can destroy half as many droids as a Jedi per minute. Each Padawans destroy 5 droids per minute.
Total droids destroyed= 720
First minute
J= 12 and P=0
Number of droids destroyed= 12*10= 120
At end, 4J retreat and 4P join
Second minute
J=8 and P=4
Number of droids destroyed = 8*10 +4*5 = 80+20 = 100
At end, 4J retreat and 4P join again
Third minute,
J=4 and P=8
Number of droids destroyed= 4*10 + 8*5 = 40+40 = 80
At end, 4P retreat and 4P join again
At end of this we now only have 12 P destroying the droids.
Total droids destroyed till now = 120+100+80 = 300
Remaining droids to be destroyed by P alone = 720-300 = 420
Time 12 P will take to destroy remaining droids alone = 420/12*5 = 420/60 = 7 minutes
At the end of each minute, four Jedi retreat and are replaced by four Padawans, each of whom can destroy half as many droids as a Jedi per minute. Each Padawans destroy 5 droids per minute.
Total droids destroyed= 720
First minute
J= 12 and P=0
Number of droids destroyed= 12*10= 120
At end, 4J retreat and 4P join
Second minute
J=8 and P=4
Number of droids destroyed = 8*10 +4*5 = 80+20 = 100
At end, 4J retreat and 4P join again
Third minute,
J=4 and P=8
Number of droids destroyed= 4*10 + 8*5 = 40+40 = 80
At end, 4P retreat and 4P join again
At end of this we now only have 12 P destroying the droids.
Total droids destroyed till now = 120+100+80 = 300
Remaining droids to be destroyed by P alone = 720-300 = 420
Time 12 P will take to destroy remaining droids alone = 420/12*5 = 420/60 = 7 minutes
