Helen cuts her lawn starting in March and finishes in October.  Her lawn mower uses 2 gallons of gas every 4th time she cuts her lawn.  For March, April, September and October, she only cuts her law 2 times per month.  In May, June, July and August, she has to cut her lawn 4 times per month.  How many gallons of gas will she need to cut her lawn from March through October?
How many times does Helen cut her lawn in March, April, September and October? ** For March, April, September and October, she cuts her lawn 2 a month. There are 4 months so she cuts her yard 2*4 = <<2*4=8>>8 times
How many times does Helen cut her lawn in May, June, July and August? ** For May, June, July and August, she cuts her lawn 4 times a month. There are 4 months so she cuts her yard 4*4 = <<4*4=16>>16 times
How many times does Helen cut her lawn from March through October? ** During the entire 8 month period, she cuts her lawn 8+16 = <<8+16=24>>24 times
How many times does Helen need to fill up her gas tank? ** Every 4th time she cuts, she needs 2 gallons of gas. If she cuts her lawn 24 times a year then she needs to fill up 24/4 = 6 times
How many gallons of gas does Helen need to cut her lawn from March through October? ** Each time she fills up, it takes 2 gallons of gas so 2*6 = <<2*6=12>>12 gallons of gas per year
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