Question

The sum of the digits of a two digits number is 10. If 36 is subtracted from the number, the digits
interchange their places. Find the number.
The difference between a 2-digit number and the number obtained by interchanging its digits 63. What is
the difference between the digits of the number?
57
Without performing actual addition and division, write the quotient when 86 +68 is divided by the
3.
4.
(b) 14
following numbers.
(a) 11
(C)
3 A
x 6
2 B 8
6. Find values of letters in the following sums :
(a) 6 A B 4
(b)
3 5 A
+ D 4 8 C
-C B &
9 3 2 7
1 8 3​

Answer 1

Answer:

Let the numbers be x and y

the number at ones place is y

and number on tens place is 10x

so the digit will be 10x+y

The interchange of digit is =10y+x

It is given the difference between the digit and interchange is 63 so

10x+y−(10y+x)=63

9x−9y=63

x−y=7

The difference between the digits is 7.

solution

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