Number System If a number is subtracted from its square we get 272. Find the number? 22 14 17 24 22 14 17 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 – x = 272 => x =17
Number System If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is: 28 180 12 160 28 180 12 160 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 (√6 + 1)² = ? + 2√6 6 7 5 8 6 7 5 8 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 Look at this series: 1000, 200, 40, ... What number should come next? 24 8 2 14 24 8 2 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP This is a simple division series. Each number is divided by 5. Rule = (1st number / 5 = 2nd number) (2nd number / 5 = 3rd number)....Now, (1000 / 5 = 200), (200 / 5 = 40), (40 / 5 = 8)...So answer is a = 8.
Number System The sum of three consecutive even numbers is 252. What is the sum of the smallest and the largest numbers? 169 170 171 168 169 170 171 168 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 168
Number System If A + B = 30 and AB = 94, What is the value of A² + B² ? 824 712 625 920 824 712 625 920 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
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