Number System What is the missing number in this series? 8 2 14 6 11 ? 14 6 18 12 2 3 7 9 2 3 7 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 9
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 ? 780 720 840 660 780 720 840 660 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 In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 54 56 58 60 54 56 58 60 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP One girl can be chosen in 4C1 = 4 ways and 4 boys can be chosen in 6C4 = 15 ways ∴ Total number of ways = 4 x 15 = 60 ways.
Number System Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number? 160 240 140 180 160 240 140 180 ANSWER DOWNLOAD EXAMIANS APP
Number System The sum of the two digits of a two-digit number is 15 and the difference between the two digits of the two digit number is 3. What is the product of the two digits of the two digit number ? None of these 36 54 14 None of these 36 54 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10 x + yWhere x > yAccording to the question,x + y = 15 and x - y = 3Solving both the equations,x = 9, y = 6∴ x x y = 9 x 6 = 54
Number System Sum of two consecutive even terms lacks by 98 from their product. Find the sum of these number None 32 18 24 None 32 18 24 ANSWER DOWNLOAD EXAMIANS APP
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