Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 10)
10.
What is the unit digit in {(6374)1793 x (625)317 x (341491)}?
Answer: Option
Explanation:
Unit digit in (6374)1793 = Unit digit in (4)1793
= Unit digit in [(42)896 x 4]
= Unit digit in (6 x 4) = 4
Unit digit in (625)317 = Unit digit in (5)317 = 5
Unit digit in (341)491 = Unit digit in (1)491 = 1
Required digit = Unit digit in (4 x 5 x 1) = 0.
Discussion:
123 comments Page 6 of 13.
Susmitha said:
1 decade ago
What is the unit digit of {3^65*6^59*7^71}? Please can anyone explain me the answer?
Ananya said:
1 decade ago
If the unit digit of (x-1)^2 is 5 and (x+1)^2 is 9 then determine the units of x^2?
Vicky said:
1 decade ago
6374 U.D is 4.
625 U.D is 5.
341 U.D is 1.
4*5*1=20.
20 U.D is 0.
Answer is zero.
625 U.D is 5.
341 U.D is 1.
4*5*1=20.
20 U.D is 0.
Answer is zero.
Harshal said:
8 years ago
In simpler manner for 4^x.
For,x=Odd unit place is 4.
and x=Even unit place is 6.
For,x=Odd unit place is 4.
and x=Even unit place is 6.
Gaurav said:
1 decade ago
Seema is right. I like her method. The way of approaching is good. Toooooo much.
Dharmraj said:
1 decade ago
Why are you consider (5) the power 317 is digit unit is 5? please explain it.
HIDD said:
1 decade ago
When power is same we can just multiple the unit number, we will get answer.
A.Athiban Sakthivel said:
1 decade ago
How unit digit in [(4^2)896 x 4] is equal to Unit digit in (6 x 4) = 4 ?
Kishore said:
1 decade ago
For finding total result is there any logic? could you please explain?
Shivani said:
1 decade ago
Thanks @Seema. I got your point otherwise all of them make me confuse.
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