Question

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Answer 1

Answer:

the answer is 72

7+2 = 9

hope this helps you

Answer 2

GIVEn

Sum of a two digit number is 9. The number obtained by interchanging the digit exceeds the given number by 27

TO FINd

Find the original number

SOLUTIOn

✯ Let the tens digit be x and ones digit be y

• Required number = 10x + y

• Number obtained by interchanging the digit = 10y + x

✞ According to the given condition

• x + y = 9 --(i)

✯ The number obtained by interchanging the digit exceeds the given number by 27

→ 10y + x = (10x + y) + 27

→ 10y + x = 10x + y + 27

→ 10y - y + x - 10x = 27

→ 9y - 9x = 27

→ 9(y - x) = 27

→ y - x = 27/9

→ y - x = 3 --(ii)

✞ Add both the equation

→ (x + y) + (y - x) = 9 + 3

→ x + y + y - x = 12

→ 2y = 12

→ y = 12/2 = 6

✞ Put the value of y in eqⁿ (ii)

→ y - x = 3

→ 6 - x = 3

→ x = 6 - 3

→ x = 3

∴ x = 3 & y = 6

Hence, the required number

→ 10x + y

→ 10*3 + 6 = 30 + 6 = 36