Now `7^4`gives unit digit 1.
:.`7^152` gives unit digit 1.
:.`7^152` gives unit digit `(1 xx 7)=7`
Also `1^72`gives digit 1.
:.Unit digit in the product =`(7 xx 1)=7`.

So,unit digit in `7^92` is 1.
:.Unit digit in `7^95` is 3.   [:. Unit digit in `1 xx 7 xx 7 xx `is 3 ]
Unit digit in `3^4`is 1
:. Unit digit in `3^56` is 1.
:. Unit digit in `3^58` is 9. [:.Unit digit in `1 xx 3 xx 3 xx` is 9]
:. Unit digit in `(7^95 - 3^58)` is 4.[Subtracting  unit digit 9 from unit digit]

=`(2 xx 2)^11 xx 7^5 xx 11^2`
=`2^11 xx 2^11 xx 7^5 xx 11^2`
=`2^22 xx 7^5 xx 11^2`.
:.The number of prime factors is (22 + 5 + 2)=29

(i) `.075=75/100=3/4`.

 (ii) `3.004=3004/100=751/250`.

 (iii) `.0056/1000=7/1250`.

(i) `1.84/2.99=184/299=8/13`.
(ii) `.365/.584=365/584=5/8`.