Number System If the difference between a number and its three-fourth is 18, find the number. 57 61 72 68 57 61 72 68 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x - 3x/4 = 18= x/4 = 18= x = 4 x 18 = 72
Number System A number consists of two digits. If 3/5 of 1/5 of the number is 9. Find the sum of its two digits? 8 60 7 12 8 60 7 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 3/5 * 1/5 = 9x = 75 => 7 + 5 = 12
Number System The sum of four consecutive even numbers is 36. Find the sum of the squares of these numbers? 252 296 388 344 252 296 388 344 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 √360 - 225 x 2 + 379 = ? 18 17 19 20 18 17 19 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √360 - 225 x 2 + 379 = √360 - 450 + 379 = √289= 17
Number System 2/11 of 3/7 of 8/13 of 12012 = ? 241 449 576 321 241 449 576 321 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 2 x 3 x 8 x 12012/11 x 7 x 13 = 576
Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 83 71 74 79 83 71 74 79 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
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