Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 343 378 396 382 343 378 396 382 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System 2/11 of 3/7 of 8/13 of 12012 = ? 449 321 576 241 449 321 576 241 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 2 x 3 x 8 x 12012/11 x 7 x 13 = 576
Number System √9216 + √15376 = ? 227 220 231 224 227 220 231 224 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √9216 + √15376= 96 + 124= 220
Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? 2 None 6 4 2 None 6 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4
Number System The sum of the two numbers is 12 and their product is 35. What is the sum of the reciprocals of these numbers? 35/8 12/35 1/35 7/32 35/8 12/35 1/35 7/32 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,a + b = 12 and ab = 35.(a + b)/ab = 12/35= (1/b + 1/a) = 12/35Sum of reciprocals of given numbers = 12/35.
Number System (4 86%of 6500) ÷ 36 =? 977.5 777.5 877.5 677.5 977.5 777.5 877.5 677.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 877.5
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