In 20 years Mark will be three times as old as he was 10 years ago how old is he

Age of Mark is 25 years.

Step-by-step explanation:

Let the current age of Mark = x years

After 20 years, age of Mark=(x+20) years

10 years ago,age of Mark was (x-10) years.

In 20 years Mark will be three times as old as he was 10 years ago.

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i believe it is 153 degrees, but since 152 is closest then 152 would be correct.