Number System 65% of 320+?=686 478 481 480 479 478 481 480 479 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 65% of 320+?=686 208+?=686?=686-208?=478
Number System 8988 / 8 / 4 = ? 2247 561.75 4494 280.875 2247 561.75 4494 280.875 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8988 * 1/8 * 1/4 = 2247/8 = 280.875
Number System If the sum of five consecutive even numbers A, B, C, D and E is 130, what is the product of A and E ? 660 720 780 840 660 720 780 840 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the consecutive even numbers be A = 2x, B = 2x + 2, C = 2x + 4, D = 2x + 6 and E = 2x + 8= A + B + C + D + E = 130= 10x + 20 = 130∴ x = 130 - 20/10 = 11Therefore, product of A and E= 22 x 30 = 660
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 ? 3 2 1 4 3 2 1 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4
Number System The Twenty-First Century will start on January 1 in the year 2101 2000 2100 2001 2101 2000 2100 2001 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2001
Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 712 920 625 824 712 920 625 824 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
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