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Theory of Equat...

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  • Question 1
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    In a shop, the cost of 3 burgers, 7 milkshakes and French fries is Rs. 120. In the same shop, the cost of 4 burgers, 10 milkshakes and French fries is Rs. 164.5. Find the cost of 1 burger, 1 milkshake and French fries in the shop.

  • Question 2
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    A two digit number becomes five-sixth of itself if the digits are reversed. The two digits differ by one. The number is

  • Question 3
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    How many positive integer pairs (a, b) satisfy the equation ab = a + b + 20?

  • Question 4
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    The number of solutions of the equation 7x + 3y = 123, where x, y > 0, is

  • Question 5
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    A piece of string is 40 cm long. It is cut into three pieces. The longest piece is three times as long as the middle-sized and the shortest piece is 23 cm shorter than the longest piece. Find the length of the shortest piece.

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