Number System If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is: 28 180 160 12 28 180 160 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, x + y = 20 and x - y = 8x2 - y2 = (x + y)(x - y) = 20 * 8 = 160.
Number System Find the least number with which 16200 should be multiplied, to make it a perfect cube. 360 45 48 36 360 45 48 36 ANSWER DOWNLOAD EXAMIANS APP
Number System Find the number of factors of 300 excluding 1 and itself. 16 18 15 14 16 18 15 14 ANSWER DOWNLOAD EXAMIANS APP
Number System (√6 + 1)² = ? + 2√6 6 5 8 7 6 5 8 7 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 The square root of 3 + “5 is : “3 /2 - 1/”2 “3 /2 + 1/”2 “5 /2 - 1/”2 “(5/2) + “(1/2) “3 /2 - 1/”2 “3 /2 + 1/”2 “5 /2 - 1/”2 “(5/2) + “(1/2) ANSWER EXPLANATION DOWNLOAD EXAMIANS APP “(5/2) + “(1/2)
Number System In how many different ways can the letters of the word CORPORATION be arranged ? None of these 1326400 3326400 2326400 None of these 1326400 3326400 2326400 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP CORPORATION = 11 letters 'O' comes thrice,'R' twice.∴ total no. of ways = 111/3121 = 3326400
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