Number System Which number should replace question mark (?) in the following equation ? ?/342 = 38/? 114 112 116 118 114 112 116 118 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 342 x 38Therefore, ? = √342 x 38 = √38 x 9 x 38 = 38 x 3 = 114
Number System If the fraction 8/6, 7/5, 18/13, 9/5 and 7/11 are arranged in descending order of their values, which one will be the second ? 7/5 3/4 2/7 1/9 7/5 3/4 2/7 1/9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8/6 = 1. 333, 7/5 = 1.4, 18/13 = 1.3849/5 = 1.8 and 7/11 = 0.636Therefore, Descending order is 9/5 > 7/5 > 18/13 > 8/6 > 7/11Therefore Second fraction is 7/5
Number System The difference between two integers is 5. Their product is 500. Find the numbers. 21, 26 20, 25 15, 20 30, 25 21, 26 20, 25 15, 20 30, 25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the integers be x and (x + 5). Then, x(x + 5) = 500 x2 + 5x - 500 = 0 (x + 25)(x - 20) = 0 x = 20So, the numbers are 20 and 25.
Number System Two third of three- fifth of one fourth of a number is 24, what is 30% of that number? 69 90 42 72 69 90 42 72 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 2/3 * 3/5 * 1/4 = 24x = 240240 * 30/100 = 72
Number System The difference between 78% of a number and 59% of the same number is 323. What is 62% of that number ? Rs. 986 Rs. 945 Rs. 926 Rs. 1054 Rs. 986 Rs. 945 Rs. 926 Rs. 1054 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.78% of x - 59% of x = 323= 78x - 59x/100 = 323= 19x/100 = 323∴ x = 323 x 100/19 = 1700= 62% of 1700 = 1700 x 62/100 = 1054
Number System How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ? 52 56 48 36 52 56 48 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36
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