Number System (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = ? 27.54 29.81 30.52 28.56 27.54 29.81 30.52 28.56 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = 70.84 - 40.32 = 30.52
Number System The sum of four consecutive even numbers is 36. Find the sum of the squares of these numbers? 344 296 388 252 344 296 388 252 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the four numbers be x, x + 2, x + 4 and x + 6.=> x + x + 2 + x + 4 + x + 6 = 36=> 4x + 12 = 36 => x = 6The numbers are 6, 8, 10 and 12.Sum of their squares = 62 + 82 + 102 + 122 = 36 + 64 + 100 + 144 = 344.
Number System In how many different ways can the letters of word "COLLEGE" be arranged ? 1240 1280 1300 1260 1240 1280 1300 1260 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 7!/2!2! = 1260(∵ L and E come twice)
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 24 84 42 21 24 84 42 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? 4 2 None 6 4 2 None 6 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 In a two-digit number, the digit in unit's place is two more than three times the digit in ten's place. If the sum of the two digits is 10, what is the number ? 24 22 28 18 24 22 28 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.∴ y = 3x + 2 .......(i)And, x + y = 10 ......(ii)From (i) and (ii), x = 2, y = 8∴ Number = 28
EXAMIANS