Question

) Seven times a two digit number is equal to four times the number obtained by reversing
the order of digits and the sum of the digits of the number is 3. Find the number. ​

Answer 1

And,the number is 12.

Reason:-

7 times 12=84

Reversing digits of 12=21

Four times 21=84

Sum of digits in 12=3

Answer 2

Answer:

36

Step-by-step explanation:

Let the unit digit be a and tenth unit be b .

So , number = 10 b + a

It's said number is seven times is equal to reversing the order of its digit.

= > 7 ( 10 b + a ) = 4 ( 10 a + b )

= > 70 b + 7 a = 40 a + 4 b

= > 66 b = 33 a

= > a = 2 b ... ( i )

Also given numbers' difference is 3 .

a - b = 3  ( ii )

From ( i ) and ( ii ) we get :

a b - b = 3

b = 3

= > a = 6

Hence number = > 30 + 6

= > 36.