# Primary School Olympiad # The lead is fragrant and charming, full of good news. It is the most beautiful thing to read the notice with joy, dream of realizing today's things, smile and remember the past and study hard. Learn to review in learning, cultivate ability in application, and constantly improve in summary. The following is "Three Questions and Answers of Olympiad Mathematics in Grade Three of Primary School" for your reference.

Number one: How many coins are there in the two boxes?

There is only twenty-five cents in box A and twenty-five cents in box B. Box A has more money than box B. 1.5 yuan ... Box B has 24 more coins than box A. How many coins are there in boxes A and B?

Answer: 66

Analysis: If box B takes 24 coins, then the number of coins in the two boxes is the same. Then the money in box A is 1.5+0.2*24=6.3 yuan. It can be concluded that the number of coins in Box A is 6.3÷(0.5-0.2)=2 1, so a * * has 2 1+2 1+24=66 coins.

How many steamed buns can a mouse steal?

Three mice stole eight steamed buns in four days (assuming that each mouse steals the same number of steamed buns every day). How many steamed buns can three mice steal in 50 days?

If three mice eat 8÷4=2 steamed buns every day, they can steal 50× 2 = 100 steamed buns in 50 days.

Chapter 3: How long is the rope?

Measure the depth of the well with a rope, fold the rope three times and leave 2 feet outside the well; Measure the rope by folding it into four folds. The upper end of the rope is away from the wellhead 1 ft. How long is the rope?

Answer: 36

Analysis: Well depth: (2 * 3+1* 4) ÷ (4-3) =10 ft.

Rope length: (10+2)*3=36 feet.