Math practice for 13 year olds - page 36 of 435
Number of problems found: 8682
- Temperature - linear function
In the morning, at 08:00 hours, the temperature was -8°C, and in the afternoon, at 16:00 hours, the temperature was 24°C. Assuming that the temperature changes steadily, what was the temperature at 13:00 hours, and what was the time when the temperature w - Average grade
Find the average grade of Nika: 87.3 86.4 92.5 94.6 95.8 Using the Honors Guide, Is it correct that Nika's rank is Second Honor? Explain your answer. Lowest Grade Average ; Rank 90-92; First Honor 88-90; Second Honor 85-88; Achiever - Salt water
The ratio of water (in liters) to salt (in grams) needs to be 3 to 2. If we add 10 grams of salt, how much water do we need to add? - Solve 23
Solve the following inequality: 4 - ½ (2 x - 3) < 1/3 (5 - 3 x) - 56.9 divided
56.9 divided by 10 missing exponents = 0.569 - Solve 22
Solve the equation with two ratios: x:14=28:196 - Ratio 28
Ratio 3 to 2. If a total of 30 dogs and cats were in the neighborhood, how many cats were there?
- The ratio 14
The ratio of boys to girls is 8:7. If there are 40 boys, how many girls are there in the class? - Peter 14
Peter bought ¼ kg, and Paolo bought 1 ½ kg of bananas. How much did they pay if each kilo costs Php 24.00? - Three mixed
5 1/4 is added to a number, and the answer is 11 1/2. What is the number? - A 100-inch
A 100-inch stick is to be divided into four using the ratio 2: 5: 7: 11. How long is the longest piece? - Scale model
In a model train set, 1.38 inches represents one foot in real life. The height of One World Trade Center in New York City is 1776 feet. How tall would a scale model of the building be? Should you calculate 1776 x 1.38 or 1776 ÷ 1.38? - Choose 2
Choose an equivalent expression for three-fourths raised to the fourth power times three-fourths raised to the third power, all raised to the second power. - The marked
The marked price of the item was P62.50. At a seasonal sale, a discount was given 20% discount, leaving the dealer a profit of 14 2/7 % of the cost of each item. Find the profit and the cost price. - A man 10
A man gave 1/6 of his SSNIT benefits to his aged mother, 1/5 to his father, and 1/2 to his wife. If he still has 400 left, which he distributed among his four sons. Calculate a) his total SSNIT b) the amount is given to his mother c) the amount is given t
- The mean
The mean of four numbers is 5, and the mean of three different numbers is 12. What is the mean of the seven numbers together? - Solve 19
Solve equation with fractions: 1/3+what=1/5 - Kenneth 2
Kenneth has 100 pennies, 20 nickels, 10 dimes, and 4 quarters. How many ways can he choose coins that total 25 cents? - Nickels and dimes Bob has a handful of nickels and dimes worth $2.45. How many dimes are there if there are 4 more nickels than dimes? Hint: A nickel is worth 5 cents, and a dime is worth 10 cents. So, one dime is worth the same as two nickels.
- Flour to water If the ratio of flour to water in a bread recipe is 5:2, how much water would you have to add to 17.5 cups of flour?
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