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 ? 6353 6383 6373 6363 6353 6383 6373 6363 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 Complete the series : 11, 12, 17, 18, 23, 24 ... 14 12 None of these 30 14 12 None of these 30 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP None of these
Number System What is the sum of the local values of the digits 2, 3, 4, 5 in the number 2345? 2345 2105 5243 2435 2345 2105 5243 2435 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2000 + 300 + 40 + 5 = 2345
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 289/290 290/289 1/289 289 289/290 290/289 1/289 289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,ab = 17, a = 1 and b = 17So, 1/a2 + 1/b2 = (a2 + b2)/a2 b2 = (12 + 172)/(1 * 17)2 = 290/289
Number System If the product of two successive positive integers is 4692, what is the smaller number ? 64 68 70 66 64 68 70 66 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∵ 68 x 69 = 4692
Number System Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number? 140 240 160 180 140 240 160 180 ANSWER DOWNLOAD EXAMIANS APP
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