Number System How many figures are required to number the pages the pages of a book containing 365 pages? 967 977 897 987 967 977 897 987 ANSWER DOWNLOAD EXAMIANS APP
Number System How many numbers up to 100 and 300 are divisible by 11? 18 22 20 21 18 22 20 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (300 – 100)/11 = 200/11 = 18 2/1118 Numbers
Number System In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 60 54 56 58 60 54 56 58 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP One girl can be chosen in 4C1 = 4 ways and 4 boys can be chosen in 6C4 = 15 ways ∴ Total number of ways = 4 x 15 = 60 ways.
Number System Two-third of a positive number and 25/216 of its reciprocal are equal. The number is: 144/25 25/144 12/5 5/12 144/25 25/144 12/5 5/12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,2/3 x = 25/216 * 1/xx2 = 25/216 * 3/2 = 25/144 x = 5/12
Number System Three numbers which are co-prime to one another are such that the product of the first two 551 and that of the last two is 1073. The sum of the three numbers is 74 85 110 93 74 85 110 93 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 85
Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 49 47 48 50 49 47 48 50 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
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