Number System If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is: 180 28 160 12 180 28 160 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, x + y = 20 and x - y = 8x2 - y2 = (x + y)(x - y) = 20 * 8 = 160.
Number System 5525 ÷ 17 = √? 99225 105625 93025 112225 99225 105625 93025 112225 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √? = 5525/17 = 325∴ ? = (325)² = 105625
Number System The difference between a number and its three-fifth is 50. What is the number? 75 None of these 100 125 75 None of these 100 125 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.
Number System If A = 1, B = 3, C = 5 and so on, what do the numbers 3, 9, 7 stand for CAR CAT BED BAT CAR CAT BED BAT ANSWER EXPLANATION DOWNLOAD EXAMIANS APP BED
Number System If 35% of a number is 899.5, what is 68% of that number ? 1747.6 1547.6 1847.6 2247.6 1747.6 1547.6 1847.6 2247.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Suppose the number is x.Then 35% of x = 899.5∴ 68% of x = 68/35 x 899.5 = 1747.6
Number System The sum of five consecutive numbers is 190. What is the sum of the largest and the smallest number ? 75 74 76 73 75 74 76 73 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
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