Latest MBA Aptitude Question SOLUTION: Find units digit : (173^45) x (152^77) x (777^999)

1) 2
2) 4
3) 6
4) 8

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(#M40016007) MBA question number systems, progressions Keep an EYE

Find units digit : (173^45) x (152^77) x (777^999)

1) 2
2) 4
3) 6
4) 8

Asked In MBA (11 years ago)

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Rats  (11 years ago)

First we take 173^45
pattern of power of 3 is 3,9,7,1 total 4
when 45/4 remainder is 1
So unit digit of 173^45=3
Now we take 152^77
pattern of power of 2 is 2,4,8,6 total 4
when 77/4 remainder is 1
So unit digit of 152^77=2
Now we take 777^999
pattern of power of 7 is 7,9,3,1 total 4
when 999/4 remainder is 3
So unit digit of 777^999=3
Therefore units digit of multiplication is 3*2*3=8

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Garima  (11 years ago)

2

units digit of (173^45) x (152^77) x (777^999) = units digit of (3^45) x (52^77) x (7^999) = units digit of 3*8*3 =2

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