Number System If 2^(2x-1) = 8^(3-x), then the value of x is: 6 9 2 5 6 9 2 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2
Number System What is the difference between the local value of 7 and 5 in the number 2574? 413 430 570 403 413 430 570 403 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 500 – 70 = 430
Number System What least number should be added to 8602 to make it a perfect square ? 51 47 36 41 51 47 36 41 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP So, (93)² = 8649So, the required number to be added to make a perfect square = 8649 - 8602 = 47
Number System In a two-digit number, the digit in unit's place is two more than three times the digit in ten's place. If the sum of the two digits is 10, what is the number ? 18 24 28 22 18 24 28 22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.∴ y = 3x + 2 .......(i)And, x + y = 10 ......(ii)From (i) and (ii), x = 2, y = 8∴ Number = 28
Number System A number when multiplied by five times of itself give the value equal to 1445. What is the number ? 15 16 18 17 15 16 18 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
Number System If the sum of one-half of a number exceeds one-third of that number by 7 1/3, the number is: 20 30 18 15 20 30 18 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,(1/2 x + 1/5 x) - 1/3 x = 22/311/30 x = 22/3x = 20
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