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a-b varies directly with a+b, a^2-b^2 will vary directly with

find the unit digit of 82^83^84^85..can u explain its solution..i.e how it is simplified in the form of 4k+1

how to solve para jumble

How do I solve the arithmatic problems

is there a section for general knowledge

say dry 42 96 get 39 kite 67

how to solve para jumbles

about percentage

2,5,18,36,?

In the concept theory of factors and cyclicity,there is description as: 172^143 mod 100 = 172*172^142mod 100 = 4*(43*172^142mod25) = 4*(43*22^142mod25) = 4*(43*484^71mod 25)...So how the value of 43*172^142mod 25 has been simplified to 43*22^142mod25 and futher..Can u please elaborate this step..