Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? 2 None 6 4 2 None 6 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4
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 ? None of these 36 14 54 None of these 36 14 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
Number System Complete the series : 1, 8, 27, 64, 125, 216 ..... 363 343 353 373 363 343 353 373 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 343
Number System The difference between 72% of a number and 49% of the same number is 575. What is 9% of that number ? 295 225 275 245 295 225 275 245 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x.Therefore, 72% of x - 49% of x = 575Therefore, (72 - 49)% of x = 575Therefore, 9% of x = 575/23 x 9 = 225
Number System 84 * 29 + 365 = ? - 2801 2436 2801 - 2071 - 2801 2436 2801 - 2071 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP - 84 * (30 - 1) + 365= - (84 * 30) + 84 + 365= - 2520 + 449 = - 2071
Number System A certain number successively divided by 2, 5 and 7 leaves remainders 1, 2 and 3 respectively. When the same number is divided by 70, what is the remainder? 35 33 36 34 35 33 36 34 ANSWER DOWNLOAD EXAMIANS APP
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