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Secondary 1 | Maths
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Date Posted: 6 years ago
Views: 306
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So original number = 25.
To check,
units digit of 25 is 5. tens digit is 2.
twice of the tens digit is 2 x 2 = 4
The units digit, 5, is one more than 4, and 4 is twice the tens digit (2) (checked)
reversing the digits gives you 52.
Twice the original number = 25 x 2 = 50
52 is two more than 50, and 50 is twice the original number of 25. (checked)
To check,
units digit of 25 is 5. tens digit is 2.
twice of the tens digit is 2 x 2 = 4
The units digit, 5, is one more than 4, and 4 is twice the tens digit (2) (checked)
reversing the digits gives you 52.
Twice the original number = 25 x 2 = 50
52 is two more than 50, and 50 is twice the original number of 25. (checked)
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