1:several person want to togwther buy a pappy. if each pay 5$, then need 90$ more to match the price of the dog. if everyone pay 50$, then the total of their can bay the puppy. so how many people want the puppy? what is the price of the puppy?
2:you have 2 bottles, one can take 6L water, the another can take 5L Water, and you can drop and refill water from water tap as many time as you can. so can you find a way to have 3L water in one bottle?
3:one day, chris asks eric how many students in grade one? eric said: if we divide the total number of students to 4 groups, there will be one extra left. then we divide one of above group into 4 smaller group, still one student left. then we use the above smaller group to divide by 4, again one more student extra. pls let me, at least, how many students in grade one?
4:a monkey fallen into a deep tunnel, and it is about 10m high. the mankey start to climbing up. the first day, he climbed 5m, but he falled asleep at night, so dropped down 4m at night. so next day, he is keep climbing for another 5m, but falled down 4m as he asleep during the night. so if thing goes like this, how many days the monkey can get out of the tunnel?
5:chris has a big fruit garden. there arenumbers of pearl tree, and 3 times more apple trees. now is time to pock up pearl and apples. everyday, chris pickup 50 apple trees and 20 pearl trees. and he was doing that for few days. in the end, he found he did all pearl trees, and still 80 apple trees left. so how many pearl and apply trees in chris garden?
6: ERIC wants milk before go to bed. dad gave him a cup of milk,eric drink 1/2 and gave the cup back to daddy. dad added water in to make a full cup and gave back to eric. eric drink about 1/3 and give cup back to dad again. dad fill in water and give back. and eric bottom up the whole cup this time. so all in all, milk or water,which one eric drink more?
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