Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 121)
121.
What is the unit digit in the product (365 x 659 x 771)?
Answer: Option
Explanation:
Unit digit in 34 = 1 
Unit digit in (34)16 = 1
Unit digit in 365 = Unit digit in [ (34)16 x 3 ] = (1 x 3) = 3
Unit digit in 659 = 6
Unit digit in 74 Unit digit in (74)17 is 1.
Unit digit in 771 = Unit digit in [(74)17 x 73] = (1 x 3) = 3
Required digit = Unit digit in (3 x 6 x 3) = 4.
Discussion:
39 comments Page 2 of 4.
Ruqiya said:
9 years ago
How it comes 6 power of 59 which equals to 6.
Please explain this.
Please explain this.
(1)
Havish said:
7 years ago
@All.
Any number to the power of 6 gives unit digit as 6. Right?
Any number to the power of 6 gives unit digit as 6. Right?
(2)
Arun Kumar Behera said:
4 years ago
Thank you @Jyoti.
Helpful explanations create value for me.
Helpful explanations create value for me.
Priya said:
9 years ago
I can't understand it. Please anyone explain me clearly.
Charan said:
1 decade ago
(6^4)^14x6^3 = 1x6 then how come (7^4)^17x7^3 = 1x3.
Madhusudhan ar said:
8 years ago
@Jyothi.
Thank you so much for your explanation.
Thank you so much for your explanation.
Soujanya S said:
9 years ago
@Jyothi.
Thanks for explaining it in easy way.
Thanks for explaining it in easy way.
Nikki said:
4 years ago
Can you please explain step by step how 6^59=6?
(1)
Amar said:
8 years ago
Why we take 3 to the power 4? Please explain.
Aung aung said:
7 years ago
I don't understand 6^59=6, please explain me.
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