Number System If the difference between a number and two-fifths of that number is 45 what is the number ? 75 77 78 76 75 77 78 76 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System What is the value of ? in the following equations ? 72/? = ?/50 40 60 80 100 40 60 80 100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 72 x 50= (6 x 6 x 2) x (5 x 5 x 2)= (6 x 5 x 2)² = (60)²∴ ? = 60
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
Number System Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number? 140 180 160 240 140 180 160 240 ANSWER DOWNLOAD EXAMIANS APP
Number System In how many different ways can the letters of the word ANATOMY be arranged ? 2520 2508 2504 2510 2520 2508 2504 2510 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Here total letters are 7 but A comes twice.Therefore, Numbers of arrangements = 7!/2! = 2520
Number System The Twenty-First Century will start on January 1 in the year 2000 2100 2001 2101 2000 2100 2001 2101 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2001
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