Number System Find the least value of 3x + 4y if x2y3 = 6. 6 3 7 10 6 3 7 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
Number System If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 82 83 81 84 82 83 81 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
Number System 64% of 2650+40% 0f 320=? 1247 1824 2096 1578 1247 1824 2096 1578 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1824
Number System The Twenty-First Century will start on January 1 in the year 2101 2001 2100 2000 2101 2001 2100 2000 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2001
Number System Two numbers are in the ratio 3:5. If 9 be subtracted from each, they are in the ratio of 9:17. The first number is: 27 18 30 36 27 18 30 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (3x-9):(5x-9) = 9:17 x = 12 => 3x = 36
Number System The difference between a two-digit number and the number obtained by interchanging the two digits is 63. Which is the smaller of the two numbers? 29 70 Cannot be determined 92 29 70 Cannot be determined 92 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's digit be x and units digit by y.Then,(10x + y) - (10y + x) = 639(x - y) = 63x - y = 7Thus, none of the numbers can be determined.
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