Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 65 45 35 55 65 45 35 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 Three times the first of three consecutive odd integers is 3 more than twice the third. The third integer is: 15 9 13 11 15 9 13 11 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the three integers be x, x + 2 and x+ 4.Then,3x = 2(x + 4) + 3x = 11Third integer = x + 4 = 15.
Number System 16.23 x 12.9 + 17.32 = ? 226.687 236.687 None of these 246.687 226.687 236.687 None of these 246.687 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 16.23 x 12.9 + 17.32= 209.367 + 17.32= 226.687
Number System What should come in the place of ' ? ' in the following number series ? 2, 5, 9, 19, 37, ? 77 76 75 78 77 76 75 78 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2 x 2 + 1 = 5;5 x 2 - 1 = 99 x 2 + 1 = 19: 19 x 2 - 1 = 3737 x 2 + 1 = 75
Number System A certain number when divided by 39 leaves a remainder 20, what is the remainder when the same number is divided by 13? 0 11 7 5 0 11 7 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 39 + 20 = 59/13 = 7 (Remainder)
Number System Find the average of the following set of scores 450, 1050, 12, 390, 143, 286, 550, 999 480 490 485 495 480 490 485 495 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required average score = (450 + 1050 + 12 + 390 + 143 + 286 + 550 + 999) / 8 = 3880 / 8 = 485
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