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Basic Math MCQ 11 (Age some years ago and current age)

MCQ 11 : Today is khadija’s birthday. After one year, she will become two times as she was ten years ago. current age of Khadija?

a) 19           b) 20            c) 21              d) 22

Solution:

 

Let today Khadija is ‘x’ years old

then 10 years ago her age = (x-10) years

One year after from today her age will be (x+1) years

By given condition;

Age after one year = 2 times the age 10 years ago

Mathematically,

\[ x+1 = 2 \times (x-10) \]

\[ x+1= 2x-20 \]

\[ 2x-x=20+1 \]

\[ x=21 \]

So her age today or current age is 21 years

so option c is correct

  
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