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 13 of 13.
Hardik Kamani said:
2 years ago
To find the unit digit of a number, you only need to consider the unit digits of the individual components and perform the operations.
Since the unit digit of 6374 is 4, 625 is 5, and 341 is 1, the unit digit of the entire expression will be (4^1793 * 5^317 * 1^491), which simplifies to 4 * 5 * 1 = 20.
The unit digit of 20 is 0.
Since the unit digit of 6374 is 4, 625 is 5, and 341 is 1, the unit digit of the entire expression will be (4^1793 * 5^317 * 1^491), which simplifies to 4 * 5 * 1 = 20.
The unit digit of 20 is 0.
(83)
Pieker said:
2 years ago
Thanks All for explaining the answer.
(5)
Rajesh Kaibarta said:
9 months ago
Very good explanation, Thanks all.
(2)
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