Number System The sum of two numbers is 25 and their difference is 13. Find their product. 114 104 315 325 114 104 315 325 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 A, B, C, D and E are consecutive even numbers respectively. The average of 5 numbers is 82. What is the product of C and E ? 6363 6353 6383 6373 6363 6353 6383 6373 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + x + 1 + x + 2 + x + 3 + x + 4 = 5 x 82= 5x + 10 = 410 = 5x = 400= x = 400/5 = 80 ∴ A = 80C = 82and E = 84= C x E = 82 x 84 = 6383
Number System The square root of 3 + “5 is : “5 /2 - 1/”2 “(5/2) + “(1/2) “3 /2 - 1/”2 “3 /2 + 1/”2 “5 /2 - 1/”2 “(5/2) + “(1/2) “3 /2 - 1/”2 “3 /2 + 1/”2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP “(5/2) + “(1/2)
Number System A number consists of two digits. If the digits interchange places and the new number is added to the original number, then the resulting number will be divisible by: 3 11 9 5 3 11 9 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's digit be x and unit's digit be y. Then, number 10x + y.Number obtained by interchanging the digits = 10y + x.(10x + y) + (10y + x) = 11(x + y)which is divisible by 11.
Number System On converting the following base-2 numeral in base ten, 1101101, we get 108 106 107 109 108 106 107 109 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 109
Number System 450% of a number is 4725. What is 82% of that number ? 851 871 841 861 851 871 841 861 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 450/100 = 4725= x = 4725 x 100/450 = 1050∴ 82% of 1050 = 1050 x 82/100= 861
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