Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 163 179 146 124 163 179 146 124 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x² = 15376Therefore, x² = 15376 x = 124
Number System What is the least number that should be added to 5200 to make it a perfect square ? 225 275 129 288 225 275 129 288 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP We sec (73)² = 5329 and (72)² = 5184ie 5329 > 5200 > 5184So 129 should be added to make is perfect square.
Number System (√6 + 1)² = ? + 2√6 7 8 6 5 7 8 6 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 In how many different ways can the letters of the word ANATOMY be arranged ? 2510 2504 2508 2520 2510 2504 2508 2520 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Here total letters are 7 but A comes twice.Therefore, Numbers of arrangements = 7!/2! = 2520
Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 36 42 16 23 36 42 16 23 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System Find the least number with which 16200 should be multiplied, to make it a perfect cube. 45 360 36 48 45 360 36 48 ANSWER DOWNLOAD EXAMIANS APP
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