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To do this problem you must add up all the amounts of candles like this 1+2+3+4+5+6+7+8+9+10+11=66 but if you cant do it mentally or write it out draw cupcakes and candles on top of them. Now for my what if question what if baby Ben had a older brother called Jay and he was 7 surprisingly he was born exact same day and exact same time and they had to buy candles for him too,how much candles would you need?