Question

in a certain game played at a casino a person gains Rs 15 if he wins and loses Rs 8. if he loses the game. what is the minimum number of games played by a person who wins Rs 20. in the end
a. 10
b. 9
c. 5
d. 8​

Answer 1

Answer:

9

Step-by-step explanation:

( 15 × 1 ) - (8 × 1) = 7

( 15 × 3 ) - (8 × 3) = 21

( 15 × 4 ) - (8 × 5) = 60 - 40 = 20

The trick is to add 15 and subtract 8

I kept on adding 15 to itself, and subtracted it by 20. If the answer is divisible by 8, you have got your answer

I did like this: (15 × 4) - 20 = 60 - 20 = 40

40 is 5 × 8

So total matches played = 4 + 5 = 9

Hope that helps

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