Problems in which sum and difference of the nos is given

Problems in which sum(difference) of unit and ten place is given and its digits get interchanged after addition(subtraction) of a certain no

Problems in which average of consecutive nos is given

Problems in which sum(difference) and product of two no is given

Problems in which sum of no and its reciprocal is given

Problems in which product of two consecutive no is given

Problems in which sum of two no and sum of their reciprocal is given

Problems in which nos are given in ratio and their sum of squares is also given

Problems in which ratio of ages is given

Locus Problems and Different types of lines