Question

A two digit number is less than 20. The
sum of the digits is double that of their
product. What is the number?
(A) 12 (B) 15 (C) 13 (D) 11​

Answer 1

Answer:

here your answer.......

11

Answer 2

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A two digit number is less than 20. The sum of the digits is double that of their product. What is the number?

(A) 12 (B) 15 (C) 13 (D) 11

${\large{\fcolorbox{aqua}{navy}{\fcolorbox{yellow}{blue}{\bf{\color{yellow}{⫷Solution⫸}}}}}}$

Let the ones digit be y.

Since the number is of 2 -digits and is less than 20, it's tens digit must be 1.

According to condition,

2×1×y = y+1

⇒2y = y+1

⇒2y-y = 1

⇒y = 1

So, y = 1.

The number

= (10×1)+y

= 10+y

Substitute y with 1.

= 10+1

= 11

${\large{\fcolorbox{aqua}{navy}{\fcolorbox{yellow}{blue}{\bf{\color{yellow}{⫷Hence⫸}}}}}}$

The number is 11.

${\huge\mathtt \pink{Done࿐}}\\{\huge\mathfrak \green{Hope\:this\: helps\:you.}}\\{\huge\mathfrak \orange{Have\:a\: nice\:day.}}$