Number System (12)² - (4.4)² - (0.04)² = ? 124.6384 129.6384 131.6384 125.6384 124.6384 129.6384 131.6384 125.6384 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (12)² - (4.4)² - (0.04)²= 144 - 19.36 - 0.0016= 124.64 - 0.0016= 124.6384
Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 5/4 3/5 3/10 4/5 5/4 3/5 3/10 4/5 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 What least number shall be added to 4700 to make it a perfect square ? 71 61 91 81 71 61 91 81 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (69)² = 4761 and (68)² = 4624Clerly 4624 < 4700 < 4761So 61 should be added to make 4700 a perfect square.
Number System How many figures are required for numbering the pages of a book containing 1000 pages? 2893 3892 6489 2883 2893 3892 6489 2883 ANSWER DOWNLOAD EXAMIANS APP
Number System 4500 * ? = 3375 2/5 1/4 3/4 3/5 2/5 1/4 3/4 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4500 * x = 3375= x = 3375/4500 = 3/4
Number System The sum of the two numbers is 12 and their product is 35. What is the sum of the reciprocals of these numbers? 1/35 12/35 7/32 35/8 1/35 12/35 7/32 35/8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,a + b = 12 and ab = 35.(a + b)/ab = 12/35= (1/b + 1/a) = 12/35Sum of reciprocals of given numbers = 12/35.
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