Examples of equations for practice for 13 year olds - page 16 of 96
Number of problems found: 1913
- Assistant
The Assistant rewrote 15% of the entire manuscript in 12 hours. How many hours must he still write to rewrite the rest of the manuscript? - Three ints
The sum of three consecutive integers is 2016. What numbers are they? - Equation - animals
There are a total of 35 hens and rabbits in the yard. They have a total of 94 feet. Calculate (by equation) how many hens there are in the yard and how many rabbits. - Trapezoid v3
The isosceles trapezoid has an angle at a first base 40 degrees less than the angle at the second base. How large angles has this trapezoid? - Internal angles
One internal angle of the triangle JAR is 25 degrees. The difference is the size of the two others is 15°. Identify the size of these angles. - Parallelogram
The parallelogram has side lengths in the ratio of 3:4 and a perimeter of 2.8 meters. Determine the lengths of the sides. - Copy typist
Typist for 12 hours, rewritten 15% of the manuscript. After how many hours will he do 35% of the manuscript? - V - slope
The slope of the line whose equation is -3x -9 = 0 is - Count of roots
How many solutions have equation x. y = 7757 with two unknowns on the set of natural numbers? - Pure quadratic equation
Solve pure quadratic equation -7x² +4 = 0. - Chocolate 81103
I paid 36 crowns for butter and chocolate. Butter was CZK 6 more expensive than chocolate. How much did the chocolate cost? - School 79774
The school has 275 pupils, and there are fifth more boys than girls. How many girls are there in the school? - Significant 71974
The difference of three times the two numbers is 33. The first number is 11, more significant than the second number. What is the value of the second number? - Younger 62334
Lenka is 12 years old, and her sister Julia is x years old. My mother is 22 years older than Julia, and at the same time, Lenka is three times younger than her mother. How old is Julia? - Crowns 43441
Petr, Jitka, and Karel have a total of 200 crowns. Petr has five crowns more than Karel. Jitka has 2x more than Karel. How many crowns does Karel have? - Second 43001
On the first day, Lenka read half of the book. On the second day, half of the rest, and on the third day, she read 35 pages and read the book. How many pages did the book have? - Together 28411
Worker A will dig a trench in 12 days. Worker B will dig a trench in 18 days. How many days will it take them together? - Original 27411
The tourist section planted 145 trees, 16% more than planned. What was the original plan? - Years 7729
Five years ago, Adam was seven times more than Peter and ten years more than Peter. How old is Adam older than Peter? - Mackerel 6531
Mackerel costs m euros. If you buy mackerel and 20 sardines, you will pay double. How much will you pay for: (a) mackerel and 40 sardines (b) three mackerel and 80 sardines
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