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: 46 24 42 26 46 24 42 26 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 Which one of the following numbers is exactly divisible by 11? 315624 235641 245642 415624 315624 235641 245642 415624 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (4 + 5 + 2) - (1 + 6 + 3) = 1, not divisible by 11.(2 + 6 + 4) - (4 + 5 + 2) = 1, not divisible by 11.(4 + 6 + 1) - (2 + 5 + 3) = 1, not divisible by 11.(4 + 6 + 1) - (2 + 5 + 4) = 0. So, 415624 is divisible by 11.
Number System The sum of three consecutive even numbers is 252. What is the sum of the smallest and the largest numbers? 168 169 170 171 168 169 170 171 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 168
Number System How many figures are required for numbering the pages of a book containing 1000 pages? 3892 6489 2883 2893 3892 6489 2883 2893 ANSWER DOWNLOAD EXAMIANS APP
Number System In an examination, 68% of the total examinees passed. If the number of failures is 248, the total number of examinees is 775 725 640 750 775 725 640 750 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Failed students are 32% which is 248.∴ Total = 24800/32 = 775
Number System If three eighth of a number is 141. What will be the approximately value of 32.08% of this number? 160 60 120 90 160 60 120 90 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 3/8 = 141 => x= 376376 * 32.08/100 = 120
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