Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 45 65 55 35 45 65 55 35 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x² - (21)² = 1584= x² - 441 = 1584 = x² = 1584 + 441 = 2025∴ x = √2025 = 45
Number System 65 x 288 ÷ 52 = 1.8 x ? 180 210 200 190 180 210 200 190 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 65x288/52x1.8 = 200
Number System √360 - 225 x 2 + 379 = ? 20 19 18 17 20 19 18 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = √360 - 225 x 2 + 379 = √360 - 450 + 379 = √289= 17
Number System Find out the smallest possible number which will be divisible by 1122 as well as 153. 4366 1366 3366 2366 4366 1366 3366 2366 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3366
Number System If a number is subtracted from its square we get 272. Find the number? 17 14 24 22 17 14 24 22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x2 – x = 272 => x =17
Number System The average of five consecutive even numbers A, B, C, D and E is 42. What is the product of B and D ? 3289 2476 1760 4589 3289 2476 1760 4589 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A + B + C + D + E/5 = 42∴ C = 42, ∴ B = 40, ∴ D = 44∴ B x D = 40 x 44 = 1760
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