Number System In how many different ways can the letters of the word CORPORATION be arranged ? 2326400 None of these 3326400 1326400 2326400 None of these 3326400 1326400 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP CORPORATION = 11 letters 'O' comes thrice,'R' twice.∴ total no. of ways = 111/3121 = 3326400
Number System If 2^(2x-1) = 8^(3-x), then the value of x is: 2 6 9 5 2 6 9 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2
Number System A bag contains eighteen 25-paise coins, seventeen 50-paise coins, twentytwo one-rupee coins, nine 2-rupee coins and three 5-rupee coins. What is the total amount in the bag (Ans in rupees) ? Rs. 62 Rs. 74 Rs. 79 Rs. 68 Rs. 62 Rs. 74 Rs. 79 Rs. 68 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total = 18/7 + 17/2 + 22 + 9 x 2 + 3 x 5 = 4.5 + 8.5 + 22 + 18 + 15 = Rs 68
Number System A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: 18 24 81 42 18 24 81 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's and unit's digit be x and 8/x respectively. Then, (10x + 8/x) + 18 = 10 * 8/x + x 9x2 + 18x - 72 = 0 x2 + 2x - 8 = 0 (x + 4)(x - 2) = 0 x = 2 So, ten's digit = 2 and unit's digit = 4. Hence, required number = 24.
Number System If 35% of a number is 899.5, what is 68% of that number ? 2247.6 1747.6 1547.6 1847.6 2247.6 1747.6 1547.6 1847.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Suppose the number is x.Then 35% of x = 899.5∴ 68% of x = 68/35 x 899.5 = 1747.6
Number System The product of two consecutive odd numbers is 6723. Find is the greater number. 83 80 85 77 83 80 85 77 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the first odd number be x.Then, the other odd number would be x + 2.∴ x(x+2) = 6723= x2 + 2x = 6723= x2 + 2x = 6723= x2 + 2x - 6723 = 0= x2 + 83 - 81 x - 6723 = 0= x(x+83) - 81 (x + 83) = 0= (x + 83) (x - 81) = 0= (x + 83) (x - 81) = 0= x - 81 = 0∴ x = 81Hence, greater number = x + 2 = 81 + 2 = 83
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