Number System If a number is subtracted from its square we get 272. Find the number? 17 24 14 22 17 24 14 22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 – x = 272 => x =17
Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 71 79 83 74 71 79 83 74 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP n x (n + 2) = 6723= n² + 2n - 6723 = 0= n² + 83n - 81n - 6723 = 0= n(n + 83) - 81 (n + 83) = 0Therefore, (n - 81) (n + 83) = 0Therefore, n = 81, n + 2 = 83
Number System What is the least number to be subtracted from 696 to make it a perfect square? 16 20 1 71 16 20 1 71 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The numbers less than 696 and are squares of certain numbers are 676, 625.The least number that should be subtracted from 696 to make it perfect square = 696 - 676 = 20.
Number System If the fractions 1/7, 3/5, 2/5, 5/6 and 9/11 are arranged in descending order of their values, which one will be the fourth number? 3/5 1/5 4/5 2/5 3/5 1/5 4/5 2/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/4 = 14. 3/5 = 6.2/5 = 4.5/6 = 83.9/11 = 82.Therefore, 83 > 82 > 6 > 14
Number System The difference between 78% of a number and 59% of the same number is 323. What is 62% of that number ? Rs. 945 Rs. 926 Rs. 986 Rs. 1054 Rs. 945 Rs. 926 Rs. 986 Rs. 1054 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.78% of x - 59% of x = 323= 78x - 59x/100 = 323= 19x/100 = 323∴ x = 323 x 100/19 = 1700= 62% of 1700 = 1700 x 62/100 = 1054
Number System Let R = qs—4. When s=8, R=16. When s=10, R is equal to 20 23 21 22 20 23 21 22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
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