Question

A man won 100000 in a lottery.he paid 2/5 of the amount as tax.he donated 1/10 of the money left to a charoty.more how much money is left with him

Answer 1

2/5 of 100000 is 40,000

and 1/10 of 100000 is 10,000

then,let money he had left be x 

40,000+10,000+x=100000

x=100000-50000

x=50000

then the money that he had left is 50,000