Find the one's digit in the cubes of the following numbers
(1) 17
(2) 12
(3) 38
(4) 53
(5) 71
(6) 84
Answers
Answer:
1. 3
2. 8
3. 2
4. 7
5. 1
6. 4
Step-by-step explanation:
(1) 17
Number at the unit's digit: 7
Cube of 7: 343.
Unit's digit of 343: 3.
Hence, the number at unit's digit of 17 is 3.
(2) 12
Number at the unit's digit: 2
Cube of 2: 8.
Unit's digit of 8: 8.
Hence, the number at unit's digit of 12 is 8.
(3) 38
Number at the unit's digit: 8
Cube of 8: 512.
Unit's digit of 512: 2.
Hence, the number at unit's digit of 38 is 2.
(4) 53
Number at the unit's digit: 3
Cube of 3: 27.
Unit's digit of 27: 7.
Hence, the number at unit's digit of 53 is 7.
(5) 71
Number at the unit's digit: 1
Cube of 1: 1.
Unit's digit of 1: 1.
Hence, the number at unit's digit of 71 is 1.
(6) 84
Number at the unit's digit: 4
Cube of 4: 64.
Unit's digit of 64: 4.
Hence, the number at unit's digit of 84 is 4.
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(1) 3
(2) 8
(3) 2
(4) 7
(5) 1
(6) 4
Step-by-step explanation:
(1)
The given number is 17
Its one's digit is 7
7's cube = 343
Thus one's digit in the cube of 17 is 3.
(2)
The given number is 12
Its one's digit is 2
2's cube = 8
Thus one's digit in the cube of 12 is 8.
(3)
The given number is 38
Its one's digit is 8
8's cube = 512
Thus one's digit in the cube of 38 is 2.
(4)
The given number is 53
Its one's digit is 3
3's cube = 27
Thus one's digit in the cube of 53 is 7.
(5)
The given number is 71
Its one's digit is 1
1's cube = 1
Thus one's digit in the cube of 71 is 1.
(6)
The given number is 84
Its one's digit is 4
4's cube = 64
Thus one's digit in the cube of 84 is 4.
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