RRB Group-D Model Paper 15 with answers for online practice

Question : 57 of 100

Marks: +1, -0

The difference of square of two consecutive odd numbers is always divisible by which number?

Solution:

Calculation:
Let two consecutive odd numbers be 1 and 3, then
According to the question
Difference of square of two consecutive odd numbers =

3^2

– 1 = 9 – 1 = 8
Now we can say that difference of square of two consecutive numbers is always divisible by 8.

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