Number System (1024—263—233)÷(986—764— 156) =? None of these 10 8 6 None of these 10 8 6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 289 289/290 290/289 1/289 289 289/290 290/289 1/289 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 In how many different ways can the letters of word "SENTENCE" be arranged ? 3360 3260 6460 2360 3360 3260 6460 2360 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 8!/3! 2! = 40320/12 = 3360
Number System In how many different ways can the letters of the word TEST' be arranged ? 12 10 8 16 12 10 8 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word TEST consists of 4 letters in which T comes twice ∴ Number of arrangements= 4!/2! = 4 x 3 x 2 x 1/2 x 1 = 12
Number System The average of five consecutive even numbers A, B, C, D and E is 54. What is the product of'B' and 'E' ? 3016 2871 4098 1456 3016 2871 4098 1456 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Because, The even numbers are consecutive and their average is 54.∴ The number C will be 54.∴ A = 50, B = 52, D = 56, E = 58B x E = 52 x 58 = 3016
Number System Supply the missing figure : 3, 11, 8, 16, 13 .... 18 18 12 28 21 18 12 28 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
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