I came across this list of questions that an atheist wrote to try to get Christians to sound stupid. These questions are excellent examples of what you would be faced with. If you can't come up with a good answer to each of these questions, you'd better think twice before entering into a debate with an atheist.
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Why won't God heal amputees?Yet supposedly heals anything that can by itself heal naturally?
How can a mother enjoy Heaven knowing her atheist son is suffering in Hell?
Why do good moral atheists go to Hell and evil immoral Jesus-accepting-Christians go to Heaven?
Why is God obsessed with testing our faith when those found of skeptical inquiry will all be led to Hell?
What finite sin deserves infinite punishment?
Why do we deserve Hell for something Adam and Eve did?Should we charge grandchildren with the crimes of their grandparents?
Why do we deserve Hell for not being as perfect as Jesus?
Why does the creationist account of the creation of the earth contradict with all of science?Is a test of faith worth the damnation of those deterred from God because of this fact?
Why would an omniscient author create such a barbaric and scientifically literate book with all the knowledge he could provide.
What about animal sacrifice entices God so intensely as to have pages and pages on how to do it?
Why is religion so demographic?
Why do people of all religions claim God speaks to them if there's only one God? Is God speaking to Hindus? Isn't that misleading for God to do?
Why does God want us to stone our rebellious children?He specifically says his words are perfect and should never change.
Why did God drown innocent babies in the Great Flood?
Why does God want us to stone non-believers and worshippers of other gods?He specifically says his words are perfect and should never change.
Why doesn't God want women to talk in church?He specifically says his words are perfect and should never change.
Why does God want us to stone people who work on Sundays?He specifically says his words are perfect and should never change.
Why did God demand so much killing and destruction?
Why did God enlighten only one specific small area of the world? Did he no forsee the immense conflict this would bring?
Why has God planted so much evidence of evolution and non-designed world?
Why would God combine our breathing and eating channels into one single orifice?Think of the lives this slipshod design has cost.
Why do so many creatures have completely useless features that evidence evolution?
In natural disasters, many people die before having accepted Jesus. Why strip their chance to get into Heaven so viciously?
Why do we still have gurus like Jesus today tricking people into believing they can perform miracles? Why should atheists disregard these gurus yet accept Jesus as the only true miracle worker?
Why does God condone slavery?
Why does the Bible say that God would direct a Holy War, and the murder of millions of people. And yet condemn mass murder as morally incorrect?
Why did God only inform Christians about "the truth" and not everyone else?
Why would God allow atheists to ask you a bunch of questions that you cannot answer, how can you save souls without the right answers to give them?
(my note-this is a terrible thing an atheist could ask. How much more personal could it get?) Why would God have Adam marry Eve who is his own daughter and then later make it immoral to mate with your own off-spring?
Why would God create the sun at the end of the week after he created the difference between night and day?
Why would God allow Darwin followers to discover all those millions of fossils which can be used as evidence to disprove the storyline of his authorized book, the Bible.
Why is the earth no longer square shaped.
Why did God not give us the free will to be perfect Christians without lieing about it?
Why did God not trust women to head up and to lead his early Christian churches?
Why did God call Paul to replace Jesus and his teachings, is it because Jesus did not communicate the message clear enough?
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And that's just a few. As you can well see, atheists have plenty of logic. Most of their questions just have to do with them not knowing that Jesus fulfilled the Old Testament. A lot of these questions are almost funny, they're so ridiculous, but they make you think. I've found that I grow the most in my faith when I am challenged in such a way. Sadly, it is mainly the Christian's fault that atheists live in such an illusioned world. Christians have created for themselves many questions like this just because they don't understand it themselves. We must strive to know more. We must ask God to reveal to us His truths in His Scriptures. We must remember what we've learned.