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# (73^2) + (74^2) =

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Math Expert
Joined: 02 Sep 2009
Posts: 64144

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07 Mar 2019, 00:42
00:00

Difficulty:

5% (low)

Question Stats:

87% (01:00) correct 13% (01:32) wrong based on 130 sessions

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$$73^2 + 74^2 =$$

A. 10784
B. 10777
C. 10779
D. 10801
E. 10805

_________________
Intern
Joined: 27 Sep 2018
Posts: 37

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07 Mar 2019, 01:24
6
1
73^2 last term(unit digit) will be 9
74^2 last term (unit digit)
will be 6

Adding the two will give last term as 5
Only option e has 5 as last term (unit digit)

Posted from my mobile device
##### General Discussion
Manager
Joined: 17 May 2018
Posts: 140
Location: India
Re: (73^2) + (74^2) =  [#permalink]

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07 Mar 2019, 00:50
1
73^2= (70+3)^2= 5329
74^2= (70+4)^2= 5476
Total= 10805
IMO E

Posted from my mobile device
Intern
Joined: 18 Aug 2017
Posts: 16
Location: India
Concentration: Strategy, Technology
Schools: ISB '20
GMAT 1: 680 Q50 V35
GPA: 3.7
WE: Management Consulting (Consumer Electronics)
Re: (73^2) + (74^2) =  [#permalink]

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31 Jan 2020, 09:40
3
73^2 last term(unit digit) will be 9
74^2 last term (unit digit)will be 6

Adding both will give 15 and therefore e is correct.
Re: (73^2) + (74^2) =   [#permalink] 31 Jan 2020, 09:40