Number System When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number? 97 103 99 101 97 103 99 101 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 - 732 = 5280 x2 = 5280 + (70+3)2 = 5280 + 4900 + 420 + 9 = 10609= 10000 + 2(100)(3) + 32 = (100 + 3)2x = 100 + 3 = 103.
Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 45 35 65 55 45 35 65 55 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x² - (21)² = 1584= x² - 441 = 1584 = x² = 1584 + 441 = 2025∴ x = √2025 = 45
Number System If the difference between a number and two-fifths of that number is 45 what is the number ? 77 78 75 76 77 78 75 76 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System A certain number of two digits is three times the sum of its digits. If 45 be added to it, the digits are reversed. The number is: 24 30 22 27 24 30 22 27 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 27
Number System Of the three numbers, second is twice the first and is also thrice the third. If the average of the three numbers is 44, the largest number is 56 44 38 72 56 44 38 72 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 72
Number System What is the greater of the two numbers whose product is 2560, given that the sum of the two numbers exceeds their difference by 64? None of these 110 90 100 None of these 110 90 100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the greater and the smaller number be g and s respectively.gs = 2560g + s exceeds g - s by 64 i.e., g + s - (g - s) = 64i.e., 2s = 64 => s = 32.g = 2560/s = 80.
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