Number System Supply the missing figure : 2, 6, 12, 20, 30 ... 56 40 42 41 39 40 42 41 39 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 42
Number System How many numbers between 300 and 800 can be by using digits 2, 4, 5, 6 and 0 ? 48 56 36 52 48 56 36 52 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∴ Reqd . numbers = 3 x 4P2 = 3 x 12 = 36
Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 35 65 45 55 35 65 45 55 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 If A + B = 30 and AB = 94, What is the value of A² + B² ? 712 625 920 824 712 625 920 824 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94 = 900 - 188 = 712
Number System 64% of 2650+40% 0f 320=? 1578 1824 1247 2096 1578 1824 1247 2096 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1824
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