Number System √343 = ? 20 18 21 19 20 18 21 19 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √343 = 18
Number System A certain number of two digits is three times the sum of its digits. If 45 be added to it, the digits are reversed. The number is: 30 24 27 22 30 24 27 22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 27
Number System If a number is subtracted from its square we get 272. Find the number? 24 17 22 14 24 17 22 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 – x = 272 => x =17
Number System A, B, C, D and E are consecutive even numbers respectively. The average of 5 numbers is 82. What is the product of C and E ? 6363 6353 6383 6373 6363 6353 6383 6373 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + x + 1 + x + 2 + x + 3 + x + 4 = 5 x 82= 5x + 10 = 410 = 5x = 400= x = 400/5 = 80 ∴ A = 80C = 82and E = 84= C x E = 82 x 84 = 6383
Number System Two numbers are in the ratio 3:5. If 9 be subtracted from each, they are in the ratio of 9:17. The first number is: 30 36 18 27 30 36 18 27 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (3x-9):(5x-9) = 9:17 x = 12 => 3x = 36
Number System (12.11)2 + (?)2 = 732.2921 20.2 17.2 14.2 24.2 20.2 17.2 14.2 24.2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 24.2
EXAMIANS