The positive difference between the squares of any two consecutive integers is always -

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Job Solution Dutch-Bangla Bank Ltd Dutch-Bangla Bank Ltd - Asst. Officer (ATM Help Desk) - 02-01-2009 গণিত
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To reproduce an old photograph, a studio charges Tk. z to make anegative, Tk. 0.6z for each of the first 10 prints, and Tk. 0.2z. for each print in excess of 10 prints. If Tk. 45 is the total charge to make one nagative and 20 prints from an old photograph then what is the value of z?

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The average of a set of 12 numbers, which includes 34, is A. If 34 is removed from the set and 38 is included to the set , what is the average of the new set of numbers in terms of A ?

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The average weight of 3 young men is 53 kg. No one of them weight less than 51 kg. What is the maximum weight of any one man ?

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A cake is made into 18 pieces . If syma takes 1/3 of the cake and Robin takes 1/3 of the rest that are left, how many pieces are still left ?

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B and C are points on straight line AD, on which AB=BC=CD. What percent of AC is AD ?

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