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 92 Cannot be determined 29 70 92 Cannot be determined 29 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.
Number System If R2 = S3 = K, where R, S and K are integers. Find the smallest positive integral value of K. (Greater than 1) 75 54 64 88 75 54 64 88 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 64
Number System Two third of three- fifth of one fourth of a number is 24, what is 30% of that number? 42 90 72 69 42 90 72 69 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 2/3 * 3/5 * 1/4 = 24x = 240240 * 30/100 = 72
Number System How many numbers up to 100 and 300 are divisible by 11? 21 18 22 20 21 18 22 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (300 – 100)/11 = 200/11 = 18 2/1118 Numbers
Number System How many numbers up to 100 are divisible by 7? 93 107 14 100 93 107 14 100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 100/7 = 14 2/7 => 14 Numbers
Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 5/4 3/5 4/5 3/10 5/4 3/5 4/5 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
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