Number System Of an amount, 20% of 25% of 30% is Rs 75. Then what is the original amount ? Rs. 3000 Rs. 4000 Rs. 2000 Rs. 5000 Rs. 3000 Rs. 4000 Rs. 2000 Rs. 5000 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the amount be x.∴ X x 20/100 x 25/100 x 30/100 = 75∴ X = 75 x 5 x 4 x 10/3 = 5000
Number System If 70% of an equal to 40% of b, then ratio between a and b is? None 7: 4 7: 11 4: 7 None 7: 4 7: 11 4: 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 70 a = 40 ba: b = 4: 7
Number System Find the average of the following set of scores 450, 1050, 12, 390, 143, 286, 550, 999 490 480 485 495 490 480 485 495 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required average score = (450 + 1050 + 12 + 390 + 143 + 286 + 550 + 999) / 8 = 3880 / 8 = 485
Number System In how many different ways can be the letters of the word PENCIL be arranged among themselves ? 860 720 640 510 860 720 640 510 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total six letters are there and hence the number of arrangements = 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720
Number System If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their square is: 12 180 160 28 12 180 160 28 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, x + y = 20 and x - y = 8x2 - y2 = (x + y)(x - y) = 20 * 8 = 160.
Number System Find the least number which when divided by 35 and 11 leaves a remainder of 1 in each case. 386 391 384 388 386 391 384 388 ANSWER DOWNLOAD EXAMIANS APP
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