Question

David has $200 in the bank. He bought a present for his mother for 1/2 of this amount and spent 1/2 of the remainder on some books. How much does he have left?

Answer 1

Let n be the initial amount of David:

n=200$

then the balance is:

k=(n-1/2*n)*1/2=1/4n=200/4=50$

Answer:50$