Number System In how many different ways can the letters of the word 'FRUGAL'be arranged ? 660 556 515 720 660 556 515 720 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 1089/? = ?/1296 1188 1278 1082 1348 1188 1278 1082 1348 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 1089 x 1296(?)²= (11 x 11 x 9) x (12 x 12 x 9)(?)= 11 x 12 x 9= 1188
Number System If the difference between a number and its 2/5 is 240, find the number. 440 360 480 400 440 360 480 400 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore x - 2x/5 = 240, Therefore, 3x/5 = 240Therefore, x = 240x5/3 = 400
Number System On dividing number by 5, we get 3 as remainder. What will be the remainder when the square of this number is divided by 5? 1 4 0 2 1 4 0 2 ANSWER DOWNLOAD EXAMIANS APP
Number System If the of a two-digit number are interchanged, the number so obtained is greater than the original number by 18. If the sum of the two digits of the number is 14. What is the original number ? 66 62 64 68 66 62 64 68 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be 10x + y.No. formed by the interchange of digits = 10y + xWe have y - x = 2 .........(i)y + x = 14 .........(ii)Solving (i) and (ii), we get x = 6, and y = 8∴ the no. is 68.
Number System What should come in the place of ' ? ' in the following number series ? 2, 5, 9, 19, 37, ? 78 77 76 75 78 77 76 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2 x 2 + 1 = 5;5 x 2 - 1 = 99 x 2 + 1 = 19: 19 x 2 - 1 = 3737 x 2 + 1 = 75
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