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Today is Maryam's birthday. After one year, she will become two times as she was ten years ago. What is the current age of Maryam?
  1. 19
  2. 20
  3. 21
  4. 22
Explanation

Let Maryum's current age be x.

Ten years ago, Maryum's age was x - 10.

After one year, Maryum's age will be x + 1.

According to the problem, after one year, Maryum's age will be two times her age ten years ago:

x + 1 = 2(x - 10)

Now, simplify the equation:

x + 1 = 2x - 20

Add 20 to both sides:

x + 21 = 2x

Subtract x from both sides:

21 = x

So, Maryum's current age is 21.

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