Question

in a 3 digit number the tens digit is thrice the units digit and the hundreds digit is four times the unit digit Also the sum of its digitis is 16 .Find the number

Answer 1

so,
unit digit =x
tens digit=3x
hundredth digit =4x
ATQ,
the eq .is
x+3x+4x=16
8x=16
x=16/8
2

Answer 2

Answer:

Let u = units digit

Let t = tens digit

Let h = hundreds digit

------------------------

given:

(1)t=3u 

(2)h=4u 

(3) u+t+h=16

----------------------

Substitute (1) and (2) into (3)

(3) u+3u+4u=16

(3) 8u=16

(3) u=2

and

(1) t=3u

(1) t=3.2

(1) t=6

and

(2) h=4u

(2) h=4.2

(2) h=8

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Hence,The number is:

862

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