Latest TCS Aptitude Question SOLUTION: What is the unit place of the sum (12)^41+(66)^66+(25)^15+(51)^61+4321 a)1 b)3 c)8 d)6

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What is the unit place of the sum
(12)^41+(66)^66+(25)^15+(51)^61+4321



a)1
b)3
c)8
d)6

Asked In TCS milan jena (8 years ago)

Unsolved Read Solution (13)

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Rishabh Kaushik  (8 years ago)

anser is 5 all options are wrong

Is this solution Helpfull? Yes (9) | No   

mahesh  (8 years ago)

2+6+5+1+1=15
so unit place will be 5

Is this solution Helpfull? Yes (7) | No   

Arun kamal Singh  (8 years ago)

12^41=last digit=2
66^66= last digit=6
25^15= last digit=5
51^61= last digit=1
4321 = last digit=1
so last digit=2+6+5+1+1=15
so last digit=5

Is this solution Helpfull? Yes (5) | No   

Puja Dhar  (8 years ago)

I think the answer is 6

Is this solution Helpfull? Yes (3) | No (5)  

Mohan  (8 years ago)

plz explain the and...

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yamini shrivastava  (8 years ago)

ans will be 6
take first term 12^41,concentrate on 2 (unit digit) and 41
the cycle of 2 is 4 (2,4,8,16,32)
so divide 41 by 4 ,remainder is 1 so unit digit of 12^41=2^1=2
similarly cycle of 6 is 1 ,remainder is 0 so unit digit of 66^66=6^0=1
same for 25^15 unit digit=1
51^61=1
so adding 2+1+1+1+1=6

Is this solution Helpfull? Yes (1) | No (10)  

swathi choda  (8 years ago)

Answer is 5.......

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kundan prasad  (8 years ago)

Ans; 5

Is this solution Helpfull? Yes (1) | No   

KROVVIDI ANANTH DUTT  (8 years ago)

The answer is 3 (b)

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shesharaupally jyothi  (8 years ago)

how? answer is 3,@@@@@@KROVVIDI ANANTH DUTT
can you please explain me.

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Snehal Chaware  (8 years ago)

Ans is 3(b)

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Vikash kumar  (8 years ago)

Answer will be 5

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sheetal singh  (8 years ago)

It's a dummy question. Answer is 5.

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