Subject
Quantitative Aptitude
Topic
Number
What is the sum of two consecutive even numbers, the difference of whose squares is 84?
What is the sum of two consecutive even numbers, the difference of whose squares is 84?
ক)
34খ)
38গ)
42ঘ)
46Explanation
Let the numbers be x and x + 2. Then, (x + 2)2 - x2 = 84 => 4x + 4 = 84 => 4x = 80 => x = 20. So, The required sum = x + (x + 2) = 2x + 2 = 42.Related questions
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