Number System If 35% of a number is 899.5, what is 68% of that number ? 2247.6 1547.6 1847.6 1747.6 2247.6 1547.6 1847.6 1747.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Suppose the number is x.Then 35% of x = 899.5∴ 68% of x = 68/35 x 899.5 = 1747.6
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 42 81 24 18 42 81 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.
Number System The sum of four consecutive even numbers is 36. Find the sum of the squares of these numbers? 388 296 344 252 388 296 344 252 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the four numbers be x, x + 2, x + 4 and x + 6.=> x + x + 2 + x + 4 + x + 6 = 36=> 4x + 12 = 36 => x = 6The numbers are 6, 8, 10 and 12.Sum of their squares = 62 + 82 + 102 + 122 = 36 + 64 + 100 + 144 = 344.
Number System 1827÷ 36 x ?=162.4 3.2 1.9 4.3 2.6 3.2 1.9 4.3 2.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3.2
Number System 217 * 217 + 183 * 183 = ? 79698 80578 81268 80698 79698 80578 81268 80698 ANSWER DOWNLOAD EXAMIANS APP
Number System The sum of the two digits of a two-digit number is 15 and the difference between the two digits of the two digit number is 3. What is the product of the two digits of the two digit number ? 36 14 None of these 54 36 14 None of these 54 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10 x + yWhere x > yAccording to the question,x + y = 15 and x - y = 3Solving both the equations,x = 9, y = 6∴ x x y = 9 x 6 = 54
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