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Updated on: 25 Feb 2020, 08:04
Originally posted by GMATinsight on 23 Feb 2020, 05:11.
Last edited by GMATinsight on 25 Feb 2020, 08:04, edited 1 time in total.
Last edited by GMATinsight on 25 Feb 2020, 08:04, edited 1 time in total.
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
60% (02:14) correct
40%
(02:28)
wrong
based on 219
sessions
History
Date
Time
Result
Not Attempted Yet
Find the unit digit of
\(72^{72}*73^{73}*74^{74}*76^{76}*77^{77}*78^{78}\)
A) 2
B) 4
c) 6
D) 8
E) None of these
Source: https://www.GMATinsight.com
\(72^{72}*73^{73}*74^{74}*76^{76}*77^{77}*78^{78}\)
A) 2
B) 4
c) 6
D) 8
E) None of these
Source: https://www.GMATinsight.com
23 Feb 2020, 15:16
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Applying Cyclicity logic for 2,3,4,6,7 and 8.
so the unit digit is 4
Posted from my mobile device
so the unit digit is 4
Posted from my mobile device
ajaymahadev
Joined: 13 Nov 2019
Last visit: 25 Feb 2020
Posts: 26
Given Kudos: 59
Location: India
Concentration: International Business, Marketing
Schools: ESSEC MiM "22 HEC MiM "22 EDHEC MiM "22
GPA: 4
Updated on: 23 Feb 2020, 19:34
Originally posted by ajaymahadev on 23 Feb 2020, 18:31.
Last edited by ajaymahadev on 23 Feb 2020, 19:34, edited 1 time in total.
Last edited by ajaymahadev on 23 Feb 2020, 19:34, edited 1 time in total.
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Kudos will be highly appreciated.
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