Question

The value of the last digit of a three digit number is 2 times the first and feed times the middle digit find the three digit number

Answer 1

Step-by-step explanation:

Let the number be 100x+10y+z where the digits in the first, middle and last are x,y and z respectively.Now, according to the question (i) x+z=2y and (ii) z-y=4x . Now, (i)−(ii)⇒x+y=2y−4x⇒y=5x. Putting x = 1 we get y=5 and this is the only admissible value of y (since other mutiples of x will make y disqualified as a digit). Again when x=1,y=5andz=4x+y=9. So, the number is 159 and the middle digit is 5.

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