Number System What is the least number, which is perfect square but contains 2700 as its factor? 1800 5400 10800 2700 1800 5400 10800 2700 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 900 * 3 * 3 = 8100
Number System A number consists of two digits. If the digits interchange places and the new number is added to the original number, then the resulting number will be divisible by: 9 3 11 5 9 3 11 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's digit be x and unit's digit be y. Then, number 10x + y.Number obtained by interchanging the digits = 10y + x.(10x + y) + (10y + x) = 11(x + y)which is divisible by 11.
Number System If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 81 84 82 83 81 84 82 83 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
Number System In how many different ways can the letters of the word "MOBILIZE" be arranged ? 17453 19765 20160 18456 17453 19765 20160 18456 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word MOBILIZE has eight letters in which I comes twice ∴ Number of arrangements = 8!/2! = 20160
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 21 42 84 24 21 42 84 24 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
Number System The sum of three consecutive multiples of 3 is 72. What is the largest number? 21 27 24 36 21 27 24 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be 3x, 3x + 3 and 3x + 6.Then,3x + (3x + 3) + (3x + 6) = 729x = 63x = 7Largest number = 3x + 6 = 27.
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