Number System What is the least number, which is perfect square but contains 2700 as its factor? 10800 5400 1800 2700 10800 5400 1800 2700 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 900 * 3 * 3 = 8100
Number System A number when multiplied by five times of itself give the value equal to 1445. What is the number ? 16 15 18 17 16 15 18 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
Number System The sum of two numbers is 22. Five times one number is equal to 6 times the other. The bigger of the two numbers is: 10 16 12 15 10 16 12 15 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and (22 - x). Then,5x = 6(22 - x) 11x = 132 => x = 12So, the numbers are 12 and 10.
Number System The sum of a number and its reciprocal is one-eighth of 34. What is the product of the number and its square root? 27 32 8 None of these 27 32 8 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,x + 1/x = 34/8 8x2 - 34x + 8 = 0 4x2 - 17x + 4 = 0 (4x - 1)(x - 4) = 0 x = 4required number = 4 * √4 = 4 * 2 = 8.
Number System In how many different ways can the letters of word 'BIOLOGY' be arranged ? 2367 2678 2520 2410 2367 2678 2520 2410 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In BIOLOGY total 7 letters are there but O comes twice.∴ Number of arrangements = 7!/2! = 2520
Number System What should come in place of (?) in the following series ? 10, 19, 30, 43, 58, ? 76 75 77 78 76 75 77 78 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The series is: +9, +11, +13, +15, +17
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