Number System The square root of 0.0081 is: 0.09 0.009 0.9 0.91 0.09 0.009 0.9 0.91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.09
Number System In how many different ways can the letters of word "COLLEGE" be arranged ? 1240 1260 1280 1300 1240 1260 1280 1300 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 7!/2!2! = 1260(∵ L and E come twice)
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? 110 90 100 None of these 110 90 100 None of these 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.
Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 71 79 74 83 71 79 74 83 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 If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ? 11 15 13 17 11 15 13 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² + (35)² = 1394Therefore, x² = 1394 - (35)² = 1394 - 1225 = 169Therefore, x = √169 = 13
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