Number System The difference between a number and its three-fifth is 50. What is the number? 125 75 None of these 100 125 75 None of these 100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.
Number System What is the least number, which is perfect square but contains 2700 as its factor? 5400 1800 2700 10800 5400 1800 2700 10800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 900 * 3 * 3 = 8100
Number System Three numbers which are co-prime to one another are such that the product of the first two 551 and that of the last two is 1073. The sum of the three numbers is 93 74 85 110 93 74 85 110 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 85
Number System 6.4 x 8.5 x 25/3.2 x 12.5 = ? 4.5 5.6 3.4 2.3 4.5 5.6 3.4 2.3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 6.4 x 8.5 x 2.5/3.2 x 12.5 = 3.4
Number System (95.6x 910.3) ÷ 92.56256 = 9? 14.44 13.34 15.54 12.24 14.44 13.34 15.54 12.24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 13.34
Number System A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: 18 81 42 24 18 81 42 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's and unit's digit be x and 8/x respectively. Then, (10x + 8/x) + 18 = 10 * 8/x + x 9x2 + 18x - 72 = 0 x2 + 2x - 8 = 0 (x + 4)(x - 2) = 0 x = 2 So, ten's digit = 2 and unit's digit = 4. Hence, required number = 24.
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