Number System A number consists of two digits. If 3/5 of 1/5 of the number is 9. Find the sum of its two digits? 8 60 12 7 8 60 12 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 3/5 * 1/5 = 9x = 75 => 7 + 5 = 12
Number System In how many different ways can the letters of word 'BIOLOGY' be arranged ? 2678 2520 2410 2367 2678 2520 2410 2367 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In BIOLOGY total 7 letters are there but O comes twice.∴ Number of arrangements = 7!/2! = 2520
Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 23 16 36 42 23 16 36 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System Find the average of the following set of scores 450, 1050, 12, 390, 143, 286, 550, 999 480 485 495 490 480 485 495 490 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required average score = (450 + 1050 + 12 + 390 + 143 + 286 + 550 + 999) / 8 = 3880 / 8 = 485
Number System A certain number when divided by 45 leaves a remainder 31, what is the remainder if the same number be divided by 15? 1 11 9 13 1 11 9 13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 45 + 31 = 76/15 = 1 (Remainder)
Number System The product of two consecutive position odd numbers is 6723. What is the smaller number? 83 71 74 79 83 71 74 79 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP n x (n + 2) = 6723= n² + 2n - 6723 = 0= n² + 83n - 81n - 6723 = 0= n(n + 83) - 81 (n + 83) = 0Therefore, (n - 81) (n + 83) = 0Therefore, n = 81, n + 2 = 83
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