Number System If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 83 82 81 84 83 82 81 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
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 6/9 4/9 5/9 3/9 6/9 4/9 5/9 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 Sum of two numbers is 15. Two times of the first exceeds by 5 from the three times of the other. Then the numbers will be? 6, 9 7, 8 9, 6 10, 5 6, 9 7, 8 9, 6 10, 5 ANSWER DOWNLOAD EXAMIANS APP
Number System In how many different ways can the letters of word "SENTENCE" be arranged ? 3360 3260 6460 2360 3360 3260 6460 2360 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 8!/3! 2! = 40320/12 = 3360
Number System Of the three numbers, second is twice the first and is also thrice the third. If the average of the three numbers is 44, the largest number is 72 44 38 56 72 44 38 56 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 72
Number System 7.8 x 4.5 x 4.2/0.14 = ? 1053 1087 1012 1032 1053 1087 1012 1032 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7.8 x 4.5 x 4.2/0.14 = 1053
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