Reason + equation - practice problems - page 2 of 36
Number of problems found: 710
- Classroom
In a classroom are 30 students, and boys are four times more than girls. How many boys are in the class? - Variations 3rd class
From how many elements can we create 13,800 variations of the 3rd class without repeating? - Secret number
Find the secret number n, which reversed decreases by 16.4 if the number increases by 16.4. - Difference 1632
The difference between the two numbers is 7. Their product 144. What are the numbers? - Chocolate and biscuit
Chocolate is twice as expensive as a biscuit. It costs CZK 8 more. How much is chocolate, and how much is a biscuit? - Family
The twins Nina and Ema have five years younger brother Michal. Together have 43 years. How old is Michal? - Digit sum
How many are three-digit numbers that have a digit sum of 6? - Unknown number
Find the unknown number equal to a quarter of a fifth of a number, which is by 152 more than an unknown number. - Number
What number do I think? The third is 6, and a half is two more than its quarter. - Expression 66754
Find the largest natural number n for which the value of the expression (37-2n) / 3 equals the natural number. - Consecutive 29761
Determine three consecutive natural numbers, the sum of which is 66. - Difference 5222
Determine the difference and the first term of AP if a3 + a4 = 48, a7 = 80. - Unknown 2881
Find an unknown number: (9 + y) x 6 = 12 x 7 y =? - Tables and chairs
The cost of 4 tables and 3 chairs is $225, and 3 tables and 4 chairs cost $195. Find the cost of 2 chairs and 1 table. - Five number code
I have a five-digit code on the bag that I forgot. I remember that it was a symmetric number and the sum of its digits was 22. Write all the numbers that can be a code. - Bikes
Pepa asked Honza how many bikes he had. He replied that he had three-quarters of their total number and another three-quarter of one bike. So how many cycles does Honza have? - AM of three numbers
The number 2010 can be written as the sum of 3 consecutive natural numbers. Determine the arithmetic mean of these numbers. - Diofant equation
250x + 120y = 5640 - Two ages
Gabrielle is nine years younger than Mikhail. The sum of their ages is 87. What is Mikhail's age? - Apples 3
Julka has five apples more than Hugo and four apples less than Annie. Hugo has 17 apples. How many apples have Julka, and how is Annie?
Do you have homework that you need help solving? Ask a question, and we will try to solve it.