Number System In how many different ways can the letters of the word "MOBILIZE" be arranged ? 20160 18456 19765 17453 20160 18456 19765 17453 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 multiplied by five times of itself give the value equal to 1445. What is the number ? 15 16 17 18 15 16 17 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x x 5x = 1445= 5x² = 1445= x² = 289∴ x = 17
Number System Which choice provides the answer in the following : If 2 * 3 = 36, 5 * 4 = 400, 6 * 2 = 144, 3 * 3 = 81; then, 5 * 5 = ? 525 325 425 625 525 325 425 625 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 625
Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 55 45 35 65 55 45 35 65 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x² - (21)² = 1584= x² - 441 = 1584 = x² = 1584 + 441 = 2025∴ x = √2025 = 45
Number System What is the least number to be subtracted from 696 to make it a perfect square? 20 1 16 71 20 1 16 71 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The numbers less than 696 and are squares of certain numbers are 676, 625.The least number that should be subtracted from 696 to make it perfect square = 696 - 676 = 20.
Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 49 48 50 47 49 48 50 47 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
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