m4maths Maths Puzzle

Two guys are tossing coin with a bet of $1 for each game. After some tosses., one guy earned $3 while the other won three times. How many games do they play.

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m4maths Other Question

Ten years before, one is seven years more than the "half the age" of other. Now the bride's age is 30 years. And also one is nine-tenths the age of other. What is groom's present age. If the root of the quadratic equation x^2-4x-log a(base3)=0 are real, then find the least value of a.