Number System If 2^(2x-1) = 8^(3-x), then the value of x is: 9 6 5 2 9 6 5 2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2
Number System If the numberator of a fraction is increased by 50% and denominator by 20% the fraction become 9/15. What was the original fraction ? 6/7 13/25 12/25 3/5 6/7 13/25 12/25 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fraction be x/yWe have 150x/120y = 9/15= x/y = 12/25
Number System When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number? 103 101 97 99 103 101 97 99 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 The product of two consecutive position odd numbers is 6723. What is the smaller number? 71 83 79 74 71 83 79 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 In how many different ways can the letters of word "SENTENCE" be arranged ? 3360 2360 6460 3260 3360 2360 6460 3260 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 8!/3! 2! = 40320/12 = 3360
Number System Write the next number in the series : 14, 16, 13, 17, 12, 18, 11 .... 15 7 19 1 15 7 19 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 19
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