A number between 200 and 300 has its tens digit four more than the units digit. If the number is written in the reverse order the number increases by 99. Find the number.

      

A number between 200 and 300 has its tens digit four more than the units digit. If the number is written in the reverse order the number increases by 99. Find the number.

  

Answers


John
Let the number be

Zxy = 100z + 10x + y

x = 4 + y ………….. (i)

Reserve

Yxz = 100y + 10x + z ….. (ii)

100y + 10x + z …… (ii)

100y + 10x + z = 100z + 10x + y + 99

99y = 297; y = 3

From equation (i),

x = 4 + 3 = 7

The number is 273
johnmulu answered the question on March 6, 2017 at 05:26


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