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A retail buyer purchase 15 white dress shirts for Tk. 1000 and 5 striped dress shirts Tk. 400. At what average price the retailer should sell a dress shirt if he wants to make a proftit of Tk. 50 each shirt?

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The angle of elevation of a ladder leaning against a wall is 60° and the foot of the ladder is 4.6 m away from the wall. The length of the ladder is

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The sum of the present ages of a father and his son is 60 years . Six years ago, father's age was five times the age of the son. After 6 years, son's age will be -

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Alam spent 20% of his income on taxes and 20% of the remainder on rent. What percent of his income he has spent on rent?

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Which of the following is the lowest positive integer divisible by 2,3,4,5,6,7,8 and 9?

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