Number System The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is: 30 20 40 None of these 30 20 40 None of these ANSWER DOWNLOAD EXAMIANS APP
Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 35 55 45 65 35 55 45 65 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 Which is the largest fraction among the following ? 12/13 24/25 21/23 21/22 12/13 24/25 21/23 21/22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21/23 = 0.913,12/13 = 0.92323/25 = 0.92, 21/22 = 0.9545, 24/25 = 0.96
Number System 3251 + 587 + 369 - ? = 3007 1300 1375 1250 1200 1300 1375 1250 1200 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 4207 - x = 3007 Then, x = 4207 - 3007 = 1200
Number System In how many different ways can the letters of the word 'FRUGAL'be arranged ? 660 556 515 720 660 556 515 720 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In FRUGAL there ae six difference letters Therefore, 6 ! = 6 x 5 x 4 x 3 x 2 x 1 = 720
Number System (3² x 4² x 5) ÷ 36 = (?)² - 80 16 10 12 14 16 10 12 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10
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