Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? 2 6 None 4 2 6 None 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4
Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 7.5 4 15 5 7.5 4 15 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
Number System Of an amount, 20% of 25% of 30% is Rs 75. Then what is the original amount ? Rs. 4000 Rs. 5000 Rs. 2000 Rs. 3000 Rs. 4000 Rs. 5000 Rs. 2000 Rs. 3000 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the amount be x.∴ X x 20/100 x 25/100 x 30/100 = 75∴ X = 75 x 5 x 4 x 10/3 = 5000
Number System √(17)² + (17)² + (5)² - 2 = ? 18 19 16 17 18 19 16 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √49 + 289 + 25 - 2 = √361 = 19
Number System 17580 x 1.8 - 13720 x 2.1 = ? x 2.4 1160 1120 1180 1140 1160 1120 1180 1140 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2.4 x ? = 31644 - 28812 = 2832∴ ? = 2832/2.4= 1180
Number System (12.11)2 + (?)2 = 732.2921 17.2 14.2 24.2 20.2 17.2 14.2 24.2 20.2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 24.2
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