Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 5/4 3/10 4/5 3/5 5/4 3/10 4/5 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System 735 chocolates were distributed equally among children in such a way that the number of chocolates received by each child is 60% of the total number of children. How many chocolates did each child rec 18 14 16 21 18 14 16 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number of children be 'x' Therefore, each child will receiveX x 60/100 = 3x/5 chocolates∴ X x 3x/5 = 735∴ x² x 735x5/3 = 1225∴ x = 1225 = 35∴ Number of chocolates = 3x/5 = 21
Number System What is the value of ? in the following equations ? 72/? = ?/50 60 80 40 100 60 80 40 100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 72 x 50= (6 x 6 x 2) x (5 x 5 x 2)= (6 x 5 x 2)² = (60)²∴ ? = 60
Number System 2/11 of 3/7 of 8/13 of 12012 = ? 576 321 449 241 576 321 449 241 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 2 x 3 x 8 x 12012/11 x 7 x 13 = 576
Number System How many figures are required for numbering the pages of a book containing 1000 pages? 2883 3892 6489 2893 2883 3892 6489 2893 ANSWER DOWNLOAD EXAMIANS APP
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