System of equations - practice for 13 year olds - page 9 of 44
Number of problems found: 871
- Waiting room
In the waiting room are people and flies. Together they have 21 heads and 102 legs (fly has six legs). How many people and flies are in the waiting room? - Elections
The elections attended a total of 4818 voters. First-day 39 men more than women, the second-day 21 women more than men. How many women attended elections? - Rectangular field
One dimension of the rectangular field is 56 m greater than the second dimension. If each side of the rectangle increases by 10 m increases, the surface field is 1480 m². Find dimensions of the field. - Rectangle - sides ratio
Calculate the area of a rectangle whose sides are in ratio 9:14 and perimeter is 388. - Basketball 83137
In the basketball game, the players threw 37 times, including 2-pointers and 3-pointers, for a total of 82 points. How many were 2 points, and how many were 3 points? - Calculate 71764
The angle at the base of an isosceles triangle is 18 ° larger than the angle at the central vertex. Calculate the size of the interior angles. - Determine 70894
The two numbers are in a 3:4 ratio. Their product is 108. Determine the larger of them. - Brothers 29471
The two brothers are 41 years old. One is seven years older than the other. How old is your younger brother? - Academy 23151
There are 180 pupils in the 1st year of the academy. There are seven girls for every five boys. How many girls are there in the year? - Gibraltar 18553
The length of the Strait of Gibraltar is 1.5 times the length of the Bering Strait. The total length of both straits is 150 km. Find the length of each waterway. - Increases 7430
The two numbers are in the ratio of 5:6. The first one decreases by ten, and the second one increases by 10, then these two numbers are in the ratio of 4:7. What are the numbers? - Summands 7380
Divide the number 4600 into two summands so that one summand is 700 larger than half of the other summand. - Netherlands 3595
Italy, the Netherlands, and Spain scored 67 goals in the tournament. The Netherlands scored two more goals than Italy, and Spain scored one goal less than Italy. Determine the number of goals. - Identify 3271
The sum of the two numbers is 110. The first number is 900% of the second number. Identify both of these numbers. - Martin 2828
Martin was three times older than Pavol 12 years ago. Now Martin is twice as old as Pavol. How old is Martin now, and how old is Pavol? - The sum 31
The sum of two fractions is 13 3/4. Their difference is 8 1/5. What are fractions? - The ages 2
The ages of the two persons differ by 18 years. Twelve years ago, the elder one was 4 times as old as, the younger one. The present age of the elder one is: - Length and width
Use the 5-step procedure. The perimeter of a rectangle is 34 in. The length is 4 in less than three times the width. Find the length and width. - Find two 2
Find two decimals between 4.56 and 6.927 so that the difference between any two consecutive decimals is the same. - In the library
The library at Lenape Elementary School has 2/5 as many fiction books as nonfiction books. There are 56 books in the school library. How many books are fiction books?
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