Number System What is the average of the following set of numbers ? 173, 192, 198, 204, 211, 223, 227 234 210 222 204 234 210 222 204 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Avg = 173 + 192 + 198 + 204 + 211 + 223 + 227/7 = 1428/7 = 204
Number System The sum of the numbers is 264. If the first number be twice the second and third number be one-third of the first, then the second number is: 54 72 48 84 54 72 48 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the second number be x. Then, first number = 2x and third number = 2x/3.2x + x + 2x/3 = 26411x/3 = 264x = 72
Number System In how many different ways can the letters of the word 'DETERMINE' be arranged ? 63480 60480 62480 61480 63480 60480 62480 61480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of arrangements = 9! / 3! Because, E comes 3 times = 60480
Number System Find the average of the following set of scores 450, 1050, 12, 390, 143, 286, 550, 999 480 490 495 485 480 490 495 485 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required average score = (450 + 1050 + 12 + 390 + 143 + 286 + 550 + 999) / 8 = 3880 / 8 = 485
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 289 289/290 1/289 290/289 289 289/290 1/289 290/289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,ab = 17, a = 1 and b = 17So, 1/a2 + 1/b2 = (a2 + b2)/a2 b2 = (12 + 172)/(1 * 17)2 = 290/289
Number System Pick the wrong number from the given number series. 3,4,10,33,135,685,4116 10 135 33 685 10 135 33 685 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The correct number is 136.3 x 1 + 1 = 44 x 2 + 2 = 1010 x 3 + 3 = 3333 x 4 + 4 = 136136 x 5 + 5 = 685685 x 6 + 6 = 4116
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