Question

in a 3 digit no the tens digit os thrice the units digit and the hundreds digit is four times the units digit.also the sjm of the digits is 16 find the no.

Answer 1

Given that

T=ten's

U=unit's

H=hundred's

According to question

T=3u

H=4u

U+T+H=16

U+3U+4U=16

8U=16

U=16/8

U=2

T=3U

T=3×2=6

H=4U

H=4×2=8

So number is 862.

Answer 2

Concept

The digit at units place of a number is called as Units Digit similarily the difit at tens place of a number is called as Tens Digit and same goes for hundreds digit.

Given

1) Number is 3-digit

2) Tens digit is thrice the units digit

3) Hundreds digit is four times the unit digit

4) Sum of the digits is 16

Find

Find the number

Solution

Let number at

Units digit be u

Tens digit be t

Hundreds digit be h

It is given that

t = 3u

h = 4u

It is also given that

u + t + h =16

u + 3u + 4u = 16

8u = 16

u = 2

Calculating tens place

t = 3u

t = 3*2

t = 6

Calculating hundreds place

h = 4u

h = 4*2

h = 8

The number is 862

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