What does the Bible teach us about gambling?
Christ did not prohibit gambling, but he taught us not to put our heart on money and not to let the want for riches conquer us. So, if you do gamble, it must not be out of greed, or to become rich to indulge in pleasures to your own gratification. Gambling, indeed, is not a wise thing to do for poor people: for if you don’t gamble you don’t loose. Why go gamble that little you have instead of to pray to God. The rich have much more and many gamble for their recreation: to win or loose makes no difference to them, for they have plenty. And indeed, we can see this as a despicable waste of money: but if those who choose to spend their money at the gambling tables because they have plenty do not forget the poor and do much more in charity, they will do a good thing in the eyes of God.
So, indeed, if you so feel, by all means, purchase a lottery ticket for a pound, but do not grow obsessed and buy multiple numbers out of uncontrolled eagerness to win. Or become obsessed with scratch-cards to your ruin, as such is not wise, and surely not the way of a prudent Christian. I myself, for example, purchase lottery tickets, not with aim to become rich but to gain a win that I can surely use to help my self and others. Christ has never expressed any distaste for this behaviour.