Number System If 1.5 x= 0.04 y, then the value of (y-x) (y+x) is: 93/77 73/77 77/73 83/77 93/77 73/77 77/73 83/77 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 73/77
Number System 1089/? = ?/1296 1348 1188 1278 1082 1348 1188 1278 1082 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 1089 x 1296(?)²= (11 x 11 x 9) x (12 x 12 x 9)(?)= 11 x 12 x 9= 1188
Number System The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference of the two digits of the number ? 2 3 1 4 2 3 1 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4
Number System One half of a two digit number exceeds its one third by 6. What is the sum of the digits of the number? 5 3 7 9 5 3 7 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x/2 – x/3 = 6=> x =63 + 6 = 9
Number System If one-seventh of a number is 55 then 40% of that number = ? 147 171 163 154 147 171 163 154 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x , Therefore, x/7 = 55Therefore, x = 55 x 7 = 385Therefore, 49% of 385 = 154
Number System The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is? 3 5 11 7 3 5 11 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 25xy = 144(x- y)2 = (x + y)2 – 4xy(x- y)2 = 625 – 576 => (x – y) = 7
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