Number System In how many different ways can the letters of word 'BIOLOGY' be arranged ? 2410 2367 2678 2520 2410 2367 2678 2520 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In BIOLOGY total 7 letters are there but O comes twice.∴ Number of arrangements = 7!/2! = 2520
Number System The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is? 11 5 3 7 11 5 3 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 25xy = 144(x- y)2 = (x + y)2 – 4xy(x- y)2 = 625 – 576 => (x – y) = 7
Number System The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference of the two digits of the number ? 2 1 4 3 2 1 4 3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (10x + y) - (10y + x) = 36,9(x - y) = 36/9 = 4
Number System Find the least value of 3x + 4y if x2y3 = 6. 3 7 10 6 3 7 10 6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
Number System 106 * 106 - 94 * 94 = ? 1904 2400 2000 1906 1904 2400 2000 1906 ANSWER DOWNLOAD EXAMIANS APP
Number System What is 25/2% of 482 times of 183 ? 12025.75 11050.75 12025.50 11025.75 12025.75 11050.75 12025.50 11025.75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 25/2% of [482 x 183]= 25/2% of 88206= 25/2 x 88206 / 100= 88206 / 8= 11025.75
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