3rd and 4th graders
September, 2015
A.1025. 28 monkeys live on an island. Some of them are jumping on trees, a few of them are playing on ropes, and the others are resting on the grass. There are a total of 19 monkeys on the trees and on the ropes. I counted a total of 17 of them on the trees and in the grass. How many monkeys are there on the trees, how many on the ropes and how many in the grass?
A.1026. A friend of mine has a few ostriches and zebras in his garden. When I visited him last, I counted a total of 18 animal heads and 46 animal legs. How many of each animal does my friend have?
A.1027. In a zoo the caretaker of the seals stores the following amounts of fish in 8 different boxes: 3 kg; 14 kg; 18 kg; 22 kg; 27 kg; 32 kg; 36 kg and 60 kg. Today he is planning to give the seals 80 kg of fish. Which boxes should he carry out to the seal pool if he wants to carry the least number of boxes and exactly 80 kg of fish?
A.1028. The fourth grade is going on a school trip. Every student had to bring in $64 for the trip to cover all costs. Unfortunately, 3 students could not participate on the trip. Therefore, every student who went on the trip had to bring in $4 more so those who did not go could get their money back. How many students went on the trip?
A.1029. A farmer separates his pigs and piglets into 3 different pig sties. 10 pigs have 1 piglet each, 10 pigs have 2 piglets each, and 10 pigs have 3 piglets each. How should he divide the animals if he wants to have the same number of animals in each sty, but he does not want to separate any piglet from his mom?
A.1030. If 5 elephants eat 10 stacks of hay in 6 days, then:
a) how many stacks of hay do 8 elephants eat in 12 days;
b)how long does it take 3 elephants to eat 60 stacks of hay;
c) how many elephants can eat 18 stacks of hay in 9 days?
A.1031. A snapping turtle and a painted turtle start to go down to the lake at the same time. The snapping turtle is 80 meters from the lake, and he can crawl 125 cm every 5 minutes. The painted turtle is 16 meters further away from the lake, but he can crawl 12 dm every 4 minutes. Which turtle reaches the lake first if they keep on going by their own speeds and never rest?
A.1032. The weight of 12 kangaroos is the same as the weight of 3 giraffes, the weight of 20 deer is the same as the weight of 2 hippopotamuses, and the weight of 2 deer is the same as the weight of 1 giraffe.
a) How many kangaroos have the same weight as 8 giraffes?
b) How many deer have the same weight as 5 hippopotamuses?
c) How many giraffes have the same weight as 6 hippopotamuses?
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providing instruction for over 700 students in Junior Kindergarten through Grade 12.
providing instruction for over 700 students in Junior Kindergarten through Grade 12.
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