Edit MetaData
8 years, 5 months ago
8 years, 5 months ago
$$47^{95}\div99$$ can be divided into two parts. Now we break the divisor 99 into two parts i.e. 11*9.
Let us find the remainder when $$47^{95}\div11$$ and when $$47^{95}\div9$$
$$Rem(47^{95}\div11) = Rem((44+3)^{95}\div11) = Rem(3^{95}\div11) = Rem(243^{19}\div11) = Rem((242+1)^{95}\div11) = 1.$$
$$Rem(47^{95}\div9) = Rem((45+2)^{95}\div9) = Rem(2^{95}\div9) =2^{2} Rem((2^{3})^{31}\div9) = 2^{2}Rem((9-1)^{31}\div9)$$
$$= 2^{2}\times-1 = -4 =5$$
Hence the remainder is a number which leaves a remainder 1 when divided by 11 and a remainder 5 when divided by 9. The smallest number such that is 23.
Quick, Easy and Effective Revision
By proceeding you agree to create your account
Free CAT Formulae PDF will be sent to your email address soon !!!