Number System Find the number, when 15 is subtracted from 7 times the number, the result is 10 more than twice of the number 15 7.5 4 5 15 7.5 4 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.7x -15 = 2x + 10 => 5x = 25 => x = 5
Number System If (17)3 is subtracted from the square of a number, the answer so obtained is 2143. What is the number ? 84 81 83 82 84 81 83 82 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x² - (17*17*17) = 2143or x² = 2143 + 4913 = 7056∴ x = 84
Number System Three numbers which are co-prime to one another are such that the product of the first two 551 and that of the last two is 1073. The sum of the three numbers is 74 85 93 110 74 85 93 110 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 85
Number System 4.78% of 1255 + 3.24% of 440=0.5% of ? 13849 11849 14849 12849 13849 11849 14849 12849 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.5 x ?/100 = 4.78 x 1255/100 + 3.24 x 440/100= 59.989 + 14.256∴ ? = 74.245 x 100/0.5 = 14849
Number System If the fractions 1/7, 3/5, 2/5, 5/6 and 9/11 are arranged in descending order of their values, which one will be the fourth number? 4/5 3/5 2/5 1/5 4/5 3/5 2/5 1/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/4 = 14. 3/5 = 6.2/5 = 4.5/6 = 83.9/11 = 82.Therefore, 83 > 82 > 6 > 14
Number System ?125÷5x ?=6265 1452 153 1253 124 1452 153 1253 124 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1253
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