Number System The sum of two numbers is 25 and their difference is 13. Find their product. 315 325 114 104 315 325 114 104 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then x + y = 25 and x - y = 13.x = 19; y = 6xy = 19 * 6 = 114
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? 92 70 29 Cannot be determined 92 70 29 Cannot be determined 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.
Number System If 35% of a number is 899.5, what is 68% of that number ? 1747.6 1547.6 2247.6 1847.6 1747.6 1547.6 2247.6 1847.6 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 the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: 40 20 30 None of these 40 20 30 None of these ANSWER DOWNLOAD EXAMIANS APP
Number System 6.4 x 8.5 x 25/3.2 x 12.5 = ? 2.3 4.5 5.6 3.4 2.3 4.5 5.6 3.4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 6.4 x 8.5 x 2.5/3.2 x 12.5 = 3.4
Number System If (72)² is subtracted from the square of a number, the answer thus obtained is 4617. What is the number ? 92 103 95 99 92 103 95 99 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (72)² = 467Therefore, x² = 4617 + 5184Therefore, x² = 9801 Therefore, x = 99
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