Number System 93296 - 45874 + 20382 - 56817 = ? 109877 109857 109867 109887 109877 109857 109867 109887 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 113678 - 102691 = 109887
Number System Which one of the following represents the sum of the first n even numbers? N(N – 1) N2 N2+ 1 N(N + 1) N(N – 1) N2 N2+ 1 N(N + 1) ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: None of these 40 20 30 None of these 40 20 30 ANSWER DOWNLOAD EXAMIANS APP
Number System 3251 + 587 + 369 - ? = 3007 1200 1375 1300 1250 1200 1375 1300 1250 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 4207 - x = 3007 Then, x = 4207 - 3007 = 1200
Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1975 1955 1945 1965 1975 1955 1945 1965 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Because (x + y)² = x² + y² + 2xy∴ x² + y² = (x + y)² - 2xy∴ x² + y² = (61)² - 2 x 888= 3721 - 1776 = 1945
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? 100 90 None of these 110 100 90 None of these 110 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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