Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 16 23 42 36 16 23 42 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 1/289 290/289 289 289/290 1/289 290/289 289 289/290 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 A number consists of two digits. If 3/5 of 1/5 of the number is 9. Find the sum of its two digits? 60 7 12 8 60 7 12 8 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 "COLLEGE" be arranged ? 1300 1280 1260 1240 1300 1280 1260 1240 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 7!/2!2! = 1260(∵ L and E come twice)
Number System Find the least number with which 16200 should be multiplied, to make it a perfect cube. 360 45 36 48 360 45 36 48 ANSWER DOWNLOAD EXAMIANS APP
Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 48 47 49 50 48 47 49 50 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
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