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Alternative approach using unit digit method without multiplication or division

Profit = Total selling - Total cost

Total selling = Profit + Total cost

Ignoring zeros---------Total selling = 39 + 1,105.......... unit digit = 4..So we should search for answer that when unit price is multiplied by 13 cars will give unit digit 4.

85 * 13= 5

88 * 13 = 4

94 * 13 = 2

124 * 13 =2

139 * 13 =7

clearly Answer is B
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Bunuel
David bought 13 BMW cars for a total price of 1,105,000 dollars. If he wants to make a profit of 39,000 dollars in the deal, at what price should he sell one car?

A. 85,000$.
B. 88,000$.
C. 94,000$.
D. 124,000$.
E. 139,000$.


We can create the equation:

13n - 1,105,000 = 39,000

13n = 1,144,000

n = 88,000

Answer: B
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