Number System How many figures are required to number the pages the pages of a book containing 365 pages? 977 967 897 987 977 967 897 987 ANSWER DOWNLOAD EXAMIANS APP
Number System If x + y = 61 and xy = 888, What is the value of x²+ y² ? 1945 1975 1965 1955 1945 1975 1965 1955 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Because (x + y)² = x² + y² + 2xy∴ x² + y² = (x + y)² - 2xy∴ x² + y² = (61)² - 2 x 888= 3721 - 1776 = 1945
Number System If 70% of an equal to 40% of b, then ratio between a and b is? 4: 7 7: 11 7: 4 None 4: 7 7: 11 7: 4 None ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 70 a = 40 ba: b = 4: 7
Number System 5525 ÷ 17 = √? 112225 99225 93025 105625 112225 99225 93025 105625 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP √? = 5525/17 = 325∴ ? = (325)² = 105625
Number System What should come in place of the question mark (?) in the given number series ? 888, 888, 444, 148, ?, 7.4 37 38 39 36 37 38 39 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let x be the missing number.Then888/888 = 1,888/444 = 2,444/148 = 3,148/x = 4= x = 148/4 = 37 and 37/7.4 = 5
Number System In a two-digit number, if it is known that its unit's digit exceeds its ten's digit by 2 and that the product of the given number and the sum of its digits is equal to 144, then the number is: 24 46 26 42 24 46 26 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's digit be x. Then, unit's digit = x + 2. Number = 10x + (x + 2) = 11x + 2 Sum of digits = x + (x + 2) = 2x + 2 (11x + 2)(2x + 2) = 144 2x2 + 26x - 140 = 0 (x - 2)(11x + 35) = 0 x = 2Hence, required number = 11x + 2 = 24.
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