Number System The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: 20 30 40 None of these 20 30 40 None of these ANSWER DOWNLOAD EXAMIANS APP
Number System If 35% of a number is 899.5, what is 68% of that number ? 1747.6 1847.6 2247.6 1547.6 1747.6 1847.6 2247.6 1547.6 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 What should come in place of question mark (?)? 8 : 1 1 : : 72: 109 99 89 79 109 99 89 79 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let ? = xTherefore 8 : 11 : 72 : xTherefore x = (11 x 72) / 8 = 99
Number System Which number should replace question mark (?) in the following equation ? ?/342 = 38/? 118 116 114 112 118 116 114 112 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 342 x 38Therefore, ? = √342 x 38 = √38 x 9 x 38 = 38 x 3 = 114
Number System The Twenty-First Century will start on January 1 in the year 2001 2101 2000 2100 2001 2101 2000 2100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2001
Number System The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference of the two digits of the number ? 1 3 2 4 1 3 2 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4
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