Number System If the difference between the squares of two consecutive numbers is 47, what is the smaller number ? 25 24 23 26 25 24 23 26 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be (x + 1) and x.Therefore, (x + 1)² - x² = 47x² + 2x + 1 - x² = 472x + 1 = 47Therefore, x = 46/2 = 23
Number System What is 25/2% of 482 times of 183 ? 11025.75 12025.50 11050.75 12025.75 11025.75 12025.50 11050.75 12025.75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 25/2% of [482 x 183]= 25/2% of 88206= 25/2 x 88206 / 100= 88206 / 8= 11025.75
Number System A certain number of two digits is three times the sum of its digits. If 45 be added to it, the digits are reversed. The number is: 30 24 22 27 30 24 22 27 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 27
Number System (√6 + 1)² = ? + 2√6 6 7 8 5 6 7 8 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (√6 + 1)² - 2√6= (√6)² + 2 x √6 + 1 + 1² - 2√6= 6 + 2√6 + 1 - 2√6 = 6 + 1 = 7
Number System If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ? 13 11 15 17 13 11 15 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² + (35)² = 1394Therefore, x² = 1394 - (35)² = 1394 - 1225 = 169Therefore, x = √169 = 13
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 21 84 42 24 21 84 42 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
EXAMIANS