Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 3/10 4/5 5/4 3/5 3/10 4/5 5/4 3/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System Sum of two consecutive even terms lacks by 98 from their product. Find the sum of these number None 32 24 18 None 32 24 18 ANSWER DOWNLOAD EXAMIANS APP
Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 42 23 36 16 42 23 36 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 124 179 163 146 124 179 163 146 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 On dividing number by 56, we get 29 as remainder. On dividing the same number by 8, what will be the remainder? 6 5 7 4 6 5 7 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let x be the number and y be the quotient. Then, x = 357 * y + 39= (17 * 21 * y) + (17 * 2) + 5= 17 * (21y + 2) + 5.Required remainder = 5.
Number System If the numberator of a fraction is increased by 50% and denominator by 20% the fraction become 9/15. What was the original fraction ? 3/5 13/25 6/7 12/25 3/5 13/25 6/7 12/25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fraction be x/yWe have 150x/120y = 9/15= x/y = 12/25
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