Number System 217 * 217 + 183 * 183 = ? 80698 81268 80578 79698 80698 81268 80578 79698 ANSWER DOWNLOAD EXAMIANS APP
Number System If the numerator of a fraction is increased by 200% and the denominator by 300%, the fraction thus obtained is 1/36. What is the original fractions ? 3/9 5/9 4/9 6/9 3/9 5/9 4/9 6/9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fractions be x/yx + 200% of x/y + 300% of y = 1/3= x + 2x/y + 3y = 1/3= 3x/4y = 1/3Hence x/y = 4/9
Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 55 45 65 35 55 45 65 35 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 The difference between 45% of a number and 18% of the same number is 145.8. What is 30% of that number ? 188 245 141 162 188 245 141 162 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.45% of x - 18% of x = 145.8∴ x/100 (45 - 18) = 145.8∴ x = 145.8 x 100/27 = 540∴ 30% of 540 = 540 x 30/100 = 162
Number System In how many different ways can the letters of the word 'DETERMINE' be arranged ? 63480 62480 60480 61480 63480 62480 60480 61480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of arrangements = 9! / 3! Because, E comes 3 times = 60480
Number System In how many different ways can be the letters of the word PENCIL be arranged among themselves ? 860 510 720 640 860 510 720 640 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
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