numerical-ability

A series of natural numbers $$F_1,F_2,F_3,F_4,F_5,F_6,F_7,\,.....$$ obeys $$F_{n+1}=F_n+F_{n-1}$$ for all integers $$n\ge2$$. If $$F_6=37$$, and $$F_7=60$$, then what is $$F_1$$ ?

Items Cost Profit% Marked price P 5400 - 5860 Q - 25 10000 Details of prices of two items P and Q are presented in the above table. The ratio of cost of item P to cost of item Q is...