Number System In how many different ways can the letters of the word 'FRUGAL'be arranged ? 660 720 515 556 660 720 515 556 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In FRUGAL there ae six difference letters Therefore, 6 ! = 6 x 5 x 4 x 3 x 2 x 1 = 720
Number System Which one of the following represents the sum of the first n even numbers? N(N – 1) N2+ 1 N2 N(N + 1) N(N – 1) N2+ 1 N2 N(N + 1) ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System Find the number of factors of 300 excluding 1 and itself. 18 16 15 14 18 16 15 14 ANSWER DOWNLOAD EXAMIANS APP
Number System 65% of 320+?=686 480 481 479 478 480 481 479 478 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 65% of 320+?=686 208+?=686?=686-208?=478
Number System A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: 81 24 42 18 81 24 42 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's and unit's digit be x and 8/x respectively. Then, (10x + 8/x) + 18 = 10 * 8/x + x 9x2 + 18x - 72 = 0 x2 + 2x - 8 = 0 (x + 4)(x - 2) = 0 x = 2 So, ten's digit = 2 and unit's digit = 4. Hence, required number = 24.
Number System If the difference between a number and its three fifths is 62, what is the number ? 175 155 165 145 175 155 165 145 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x - 3x/5 = 62or x = 62 x 5/2 = 155
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