Number System How many figures are required to number the pages the pages of a book containing 365 pages? 967 977 987 897 967 977 987 897 ANSWER DOWNLOAD EXAMIANS APP
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: 26 46 24 42 26 46 24 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.
Number System The average of 7 numbers is 15, that of the first three is 6 and that of the last three is 23. What is the fourth number? 18 7 15 13 18 7 15 13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4th No. = (Total of 7 Nos) - (Total of first three + total of last 3) = (15 x 7) - (6 x 3 + 23 x 3) = 105 - (18 + 69) =105 - 87 = 18
Number System Complete the series : 11, 12, 17, 18, 23, 24 ... None of these 14 12 30 None of these 14 12 30 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP None of these
Number System Find the least value of 3x + 4y if x2y3 = 6. 6 7 3 10 6 7 3 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 146 179 163 124 146 179 163 124 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
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