If 4a+4b+4c+4d=112, what is the average of a,b,c and d ?

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Job Solution Dutch-Bangla Bank Ltd Dutch-Bangla Bank Ltd - Trainee Officer - 24.09.2010 গণিত
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Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is ---

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f(x) = -1, for all x>0. If f(a) = -1 and f(ab) = -1 then b = ?

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A wholesaler bought 1200 pens for TK 18 each . He sold 60% of the pens for TK. 30 each and remaining for TK. 15 each. What was his average profit per pen ?

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The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and difference of the digits of the number if the ratio between the digits the number is 1 : 2?

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Rahim, Karim and James paid a total TK. 45 for their dinner at a restaurant . If Rahim paid of the total amount, Karim paid TK. 17 and James paid the rest then what fraction of the total amount did James pay ?

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