Math practice for 13 year olds - page 91 of 434
Number of problems found: 8665
- Supermarket 79504
The supermarket reduced the original price of the skis by 20% in January. At the beginning of February, they reduced the new price by another 29%. By what percentage were the skis' costs lower than the original price in February? - A test 3
A test of five light bulbs showed that they burned for the following lengths of time (in days): 17 2/3, 19 1/4, 20 1/2, 21, and 18 3/4. For how many days, on average, did the light bulbs burn? - Expressed 79474
The length of the cube's edge in cm is expressed as a natural number. Its volume is greater than 100 and less than 200. Calculate the surface area of the cube. - Divisible 79464
The teacher wrote a number less than 50,000 on the board. The first student said: This number is divisible by 2 The second student said: This number is divisible by 3 And so on, down to the last one who claimed it was divisible by 13. Two in a row lied. W - Yesterday 79344
Petr played Minecraft for 2 hours yesterday. Pavel played 10% longer. How many minutes did Pavel play? - Blackboard 79334
The biology teacher, Carrot, randomly called the students to the blackboard. There were 25 pupils in the class, and Mr. Carrot called Ludek, Silva, and Mathias. What percentage of the total number of students was called today? - The angles 3
The angles in a triangle are in the ratio of 3:4:5. Work out the size of each angle.
- Blueberries 79284
Lenka, Jane, and Michael collected blueberries in the ratio of 3:4:2. Lenka collected 4.5 liters of blueberries. How many blueberries did Jane and Michael collect? - Completely 79274
Kitchen cabinets are sold in widths of 80 cm, 60 cm, and 40 cm. Which assembly can we choose if we have a wall 3.5 m long and we want to completely fill it with an assembly that also includes a dishwasher, the width of which is 60 cm, and the stove is 50 - Pasture 79214
I need to find out the number of bulls in the third period. In the first period, 12 bulls grazed on 3 and 1/3 ha for 4 weeks. In the second period, 21 bulls graze on 10 ha for 9 weeks. How many bulls in the third period graze for 24ha and 18 weeks? The pa - Owl A,B,C
Owl a gives a hoot every 7 minutes. Owl b gives a hoot every 9 minutes. Owl c gives a hoot every 5 minutes except when he has heard owl a or b give a hoot within the previous 2.5 minutes. If this happens, owl c doesn't give a hoot. If all three owls give - Calculate 79144
The circle's radius is r=8.9 cm, and the chord AB of this circle has a length of 16 cm. Calculate the distance of chord AB from the center of the circle. - Difference 79094
Trapezoid, gamma angle=121°, alpha angle=2 thirds of delta angle. Calculate the angle difference alpha, beta - Value of a expression
Find the value 5(11)-10²-15+20 - A box 5
A cereal box states that a 3/4-cup serving contains 90 calories. How many Calories are in 4 cups of cereal?
- Pencils 4
Pencils, Pens, and Exercise books in a shop are in the ratio of 1:2:3. If there are 12 pencils, the number of exercise books in the shop is: - Using bicycle
There are 36 pupils in Grade VI Sampaguita. Seventy-five percent of them use a bicycle to go to school. How many pupils are using a bicycle? - The half of sum Half the sum of a number and 1.75 is -5.1. What is the number? Enter your answer as a simplified mixed number in the box. .
- Hand soap
A bottle of hand soap costs $2.50. The same bottle of hand soap went on sale for $2.00. What is the percent decrease in the price of hand soap? - The coordinates 2
The coordinates of the vertices of the triangle shown are A(1,7), B(5,2), and C(5,7). What is the length of segment AB in units?
Do you have unsolved problem that you need help? Ask a question, and we will try to solve it. Solving math problems.
