Number System If the product of two successive positive integers is 4692, what is the smaller number ? 66 68 64 70 66 68 64 70 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ∵ 68 x 69 = 4692
Number System The peresent age of the father and the son are in the ratio of 8:3. After 12 years the ratio of their ages will be 2:1. What is the sum of the present age of the father and the son ? 66 years 69 years 68 years 67 years 66 years 69 years 68 years 67 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the present age of the father be 'x' and that of the son be 'y'. Then x/y = 8/3∴ 3x = 8y Further, x + 12/y + 12 = 2/1 ∴ x + 12 = 2y + 24 ∴ x - 2y = 12 ......(ii)From eqn (i) and (ii), x = 48, y = 18 ∴ sum = 66 yrs.
Number System The Twenty-First Century will start on January 1 in the year 2001 2100 2000 2101 2001 2100 2000 2101 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2001
Number System The sum of two numbers is 165 and the difference between them is 9. What is the average of these two numbers ? 84.5 82.5 83.5 85.5 84.5 82.5 83.5 85.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 165x - y = 92x = 174 ∴ x = 87 and y = 78∴ x + y/2 = 165/2 = 82.5
Number System What number should replace both the question marks (?) in the following question ? 83 85 82 84 83 85 82 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 84
Number System 16.23 x 12.9 + 17.32 = ? 236.687 None of these 226.687 246.687 236.687 None of these 226.687 246.687 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 16.23 x 12.9 + 17.32= 209.367 + 17.32= 226.687
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