**Find the greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively**.

129

136

127

199

C. 127

Required number = H.C.F. of (1657 - 6) and (2037 - 5) = H.C.F. of 1651 and 2032

H.C.F of 1651 and 2032 =127

Required number = 127.