Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 163 146 124 179 163 146 124 179 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x² = 15376Therefore, x² = 15376 x = 124
Number System What is the sum of all the composite numbers up to 20? 132 128 130 131 132 128 130 131 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 = 132
Number System If the fractions8/5,7/2,9/5,5/4,4/5 are arranged in descending order of their values, which one will be fourth? 7/9 5/4 1/3 11/13 7/9 5/4 1/3 11/13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5/4
Number System Simplify the 121 * 175 + 363 * 275 363000 None of these 316600 328100 363000 None of these 316600 328100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 121 * 175 + 363 * 275 => 121 * 175 + 121 * 3 * 275121 * 175 + 121 * 825= 121 * (175 + 825) = 121000
Number System What is the sum of all the numbers between 300 and 1000 which are divisible by 179? 2517 2527 2607 2506 2517 2527 2607 2506 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 358/179 ….. 895/179179(2 + 3 + 4 + 5) => 2506
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 ? 5/9 6/9 4/9 3/9 5/9 6/9 4/9 3/9 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
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