Number System Find the smallest number which should be multiplied with 520 to make it a perfect square. None of these 55 30 120 None of these 55 30 120 ANSWER DOWNLOAD EXAMIANS APP
Number System {(742)² ÷ 36} ÷ 2 = ? 422.5 420.5 423.5 421.5 422.5 420.5 423.5 421.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (174 x 174/36) ÷ 2 = 841/2 = 420.5
Number System In how many different ways can the letters of the word "MOBILIZE" be arranged ? 18456 19765 20160 17453 18456 19765 20160 17453 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word MOBILIZE has eight letters in which I comes twice ∴ Number of arrangements = 8!/2! = 20160
Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 712 920 824 625 712 920 824 625 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
Number System What is the greater of the two numbers whose product is 2560, given that the sum of the two numbers exceeds their difference by 64? 90 100 110 None of these 90 100 110 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the greater and the smaller number be g and s respectively.gs = 2560g + s exceeds g - s by 64 i.e., g + s - (g - s) = 64i.e., 2s = 64 => s = 32.g = 2560/s = 80.
Number System The difference between a two-digit number and the number obtained by interchanging the two digits is 63. Which is the smaller of the two numbers? 70 29 Cannot be determined 92 70 29 Cannot be determined 92 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's digit be x and units digit by y.Then,(10x + y) - (10y + x) = 639(x - y) = 63x - y = 7Thus, none of the numbers can be determined.
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