Number System In an examination, 68% of the total examinees passed. If the number of failures is 248, the total number of examinees is 725 640 775 750 725 640 775 750 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Failed students are 32% which is 248.∴ Total = 24800/32 = 775
Number System 1260 x 1.45 - 888 x 1.75 = ? 367 256 295 273 367 256 295 273 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 1260 x 1.45 - 888 x 1.75= 1827 - 1554 = 273
Number System A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number? 3.5 6 8 None of these 3.5 6 8 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8
Number System In how many different ways can the letters of the word TEST' be arranged ? 16 10 8 12 16 10 8 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word TEST consists of 4 letters in which T comes twice ∴ Number of arrangements= 4!/2! = 4 x 3 x 2 x 1/2 x 1 = 12
Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? 2 4 None 6 2 4 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 The difference between a number and its three-fifth is 50. What is the number? 100 None of these 75 125 100 None of these 75 125 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.