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Adam who is 20 years old is 4 times as old as Mary. What will be Mary’s age when Adam is twice as old as her?
5Q:
Adam who is 20 years old is 4 times as old as Mary. What will be Mary’s age when Adam is twice as old as her?
- 130 yearsfalse
- 217 yearsfalse
- 335 yearsfalse
- 415 yearstrue
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Answer : 4. "15 years"
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