Number System In how many different ways can the letters of the word 'LEASE' be arranged ? 80 60 None of these 40 80 60 None of these 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The world LEASE consists of 5 letters in which E comes twice ∴ 51/21 = 5x4x3x2x1/2x1 = 60
Number System 5525 ÷ 17 = √? 93025 99225 105625 112225 93025 99225 105625 112225 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √? = 5525/17 = 325∴ ? = (325)² = 105625
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 ? 840 720 660 780 840 720 660 780 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 different ways can the letters of word 'BIOLOGY' be arranged ? 2367 2520 2410 2678 2367 2520 2410 2678 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In BIOLOGY total 7 letters are there but O comes twice.∴ Number of arrangements = 7!/2! = 2520
Number System If 1.5 x= 0.04 y, then the value of (y-x) (y+x) is: 83/77 77/73 73/77 93/77 83/77 77/73 73/77 93/77 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 73/77
Number System The product of two consecutive odd numbers is 4623. What is the product of the next two consecutive odd numbers ? 7745 5183 8795 6782 7745 5183 8795 6782 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √4623 = 6767 x 69 = 4623∴ Required product = 71 x 73 = 5183
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