Number System √207.36 = ? 16.7 14.4 15.7 12.3 16.7 14.4 15.7 12.3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √207.36 = √20736/√100 = 144/10 = 14.4
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 ? 720 780 660 840 720 780 660 840 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 In how many different ways can the letters of word "SENTENCE" be arranged ? 3360 2360 6460 3260 3360 2360 6460 3260 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 8!/3! 2! = 40320/12 = 3360
Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 4/5 5/4 3/5 3/10 4/5 5/4 3/5 3/10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System {(742)² ÷ 36} ÷ 2 = ? 421.5 423.5 420.5 422.5 421.5 423.5 420.5 422.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (174 x 174/36) ÷ 2 = 841/2 = 420.5
Number System If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number. 94 97 86 91 94 97 86 91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
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