Number System The sum of two numbers is 165 and the difference between them is 9. What is the average of these two numbers ? 85.5 84.5 83.5 82.5 85.5 84.5 83.5 82.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 165x - y = 92x = 174 ∴ x = 87 and y = 78∴ x + y/2 = 165/2 = 82.5
Number System What should come in place of (?) in the following series ? 10, 19, 30, 43, 58, ? 77 75 78 76 77 75 78 76 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The series is: +9, +11, +13, +15, +17
Number System On multiplying a number by 7, the product is a number each of whose digits is 3. The smallest such number is: 48619 47649 47719 47619 48619 47649 47719 47619 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP By hit and trail, we find that47619 * 7 = 333333.7) 333333 (47619 333333---------------- 0
Number System If (72)² is subtracted from the square of a number, the answer thus obtained is 4617. What is the number ? 95 92 99 103 95 92 99 103 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (72)² = 467Therefore, x² = 4617 + 5184Therefore, x² = 9801 Therefore, x = 99
Number System Three seventh of a number is 12 more than 40% of that number. What will be the 60% of that number? 126 210 148 248 126 210 148 248 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/7 x – 40/100 x = 12x = 35 * 1235 * 12 * 60/100 = 252/2 = 126
Number System If one third of 3/4 of a number is 21. Then find the number? 630 63 840 84 630 63 840 84 ANSWER DOWNLOAD EXAMIANS APP
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