Number System If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 83 81 82 84 83 81 82 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
Number System The product of two consecutive odd numbers is 4095 What is the greater number ? 61 69 74 65 61 69 74 65 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the two consecutive odd numbers be 2x - 1 and 2x + 1.(2x - 1) (2x - 1) = 4095= 4x² - 1 = 4095= 4x² = 4096= x² = 1024∴ x = 32∴ The numbers are 63 and 65.Greater number = 65
Number System Twenty times a positive integer is less than its square by 96. What is the integer? Cannot be determined 30 24 20 Cannot be determined 30 24 20 ANSWER DOWNLOAD EXAMIANS APP
Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1200 1082 1192 1092 1200 1082 1192 1092 ANSWER DOWNLOAD EXAMIANS APP
Number System If the fractions8/5,7/2,9/5,5/4,4/5 are arranged in descending order of their values, which one will be fourth? 1/3 7/9 11/13 5/4 1/3 7/9 11/13 5/4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5/4
Number System ?2704 x ?2209=? 4444 1444 2444 3444 4444 1444 2444 3444 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2444
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