Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 15 7.5 5 4 15 7.5 5 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
Number System What is the difference between the largest number and the least number written with the figures 3, 4, 7, 0, 3? 70983 43883 43983 43893 70983 43883 43983 43893 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 74330 Largest30347 Smallest-------------43983
Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 47 50 48 49 47 50 48 49 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
Number System The sum of the numbers is 264. If the first number be twice the second and third number be one-third of the first, then the second number is: 72 84 54 48 72 84 54 48 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the second number be x. Then, first number = 2x and third number = 2x/3.2x + x + 2x/3 = 26411x/3 = 264x = 72
Number System The sum of five consecutive numbers is 190. What is the sum of the largest and the smallest number ? 76 73 74 75 76 73 74 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + x + 1 + x + 2 + x + 3 + x + 4= 190= 5x + 10 = 190= 5x = 190 - 10 = 180= x = 180/5 = 36The largest number = 36 + 4 = 40∴ Required sum = 36 + 40 = 76
Number System Find the least value of 3x + 4y if x2y3 = 6. 7 6 3 10 7 6 3 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
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