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13 A two digit number is such that the product of two digits is 12. When 9 is added to the number
the digits are interchanged. Find the number.
14. How many terms of the sequence 18, 16, 14.......... should be taken so that their sum is zero?
15. Find the area of the rhombus, if the vertices are (3,0),(4,5),(-1,4) and (-2,-1) taken in
order.Solve the equation: + 5 = a +b; 2 + b2 = 2.
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Step-by-step explanation:
13) the no. is 43
14) 7
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