Question
What is the sum of two consecutive even numbers, the difference of whose squares is 84?
Answer: Option C
Was this answer helpful ?
Let the numbers be x and x + 2.
Then, (x + 2)2 - x2 = 84
\(\Rightarrow\) 4x + 4 = 84
\(\Rightarrow\) 4x = 80
\(\Rightarrow\) x = 20.
Therefore The required sum = x + (x + 2) = 2x + 2 = 42.
Was this answer helpful ?
More Questions on This Topic :
Question 1. 186 x 186 + 159 x 159 - 2 x 186 x 159 =? ....
Question 3. If (64)2 - (36)2 = 20z, the value of z is: ....
Question 5. 39798 + 3798 + 378 =? ....
Latest Videos
Latest Test Papers
Submit Solution