Math practice for 13 year olds - page 164 of 433
Number of problems found: 8660
- Miligrams of vitamins
15.38 mg of vitamin C/oz. How much is vitamin C in an orange that weighs 635 oz? - Missing digit
If 4x/6x + 5/17 = 1, what digit does the x represents - Social Security Administration
In January 2012, the Social Security Administration increased benefits to its recipients for the first time since 2009. Before the increase, James received $1200/month. After the increase, he received $1243.20/month. Find the percent increase in Social Se - Mike built
Mike built a cylindrical water tank with a radius of about 1.8 m and a height of 2 meters. How many liters of water will it hold? - Numbers 42291
How many five-digit odd numbers exist? - Alcohol risk
The 2009 Youth Risk Behavior Survey found that about 5 out of 12 high school students drank some alcohol in the 30 days preceding the survey. If a high school has 2400 students, how many would be expected to have used alcohol within 30 days? - Class enrollment
A grade 6 class went on a field trip only 98% or 49 pupils joined the activity. What was the class enrollment?
- Applicants 42261 Of the 4,500 applicants, 2/9 were successful in the university entrance exams. How many applicants were successful?
- Kilometers 42251
On the first day, cyclists walked 2/5 of the way, which is 4/35 km. How many kilometers do they have to travel the next day to complete the entire route? - Email hoard
Kendrick received 24 fewer e-mails on Friday than he did on Thursday. If he received a total of 126 e-mails on those two days, how many did he get each day? - Different 42191
How many different triangles with vertices formed by points A, B, C, D, E, and F can we create? - Two dice
We roll two dice. What is the probability that the sum of the falling numbers is greater than 3? - Quadrilateral 42151
Calculations from geometry: The ratios of the sides of the quadrilateral are 3 : 6:4.5 : 3.5. Calculate their lengths if the circumference is 51 cm. The sizes of the angles in the quadrilateral are equal to 29°30', 133°10', and 165°20'. What is the size o - Fractions: 42141 Fractions: 14/17. 34/56 + 6/9 + 10/13 : 5/26 = 10/16 - ¼ + 15/18 : 5/9 = ¾. (25/42 - 3/7) +16/21 : 4/7 = 2. Whole numbers: (-12) + (-6). (-2) - (-14) : 2 = 35 : (-5) + (-12) . 2 + (-6) = 42 : (-3) . (-5) - (-12)+ (-16) =
- Percentage 42121
Tomáš took out a loan to buy a washing machine. In the following 12 months, according to the contract, he had to repay the amount of 150 euros. The price of the washing machine is 1200 euros. What percentage is the annual interest rate? Write in the form
- Borrowed 42101
Zuza borrowed a certain amount from the bank, with the proviso that she would return 15,000 euros a year. The annual interest rate was set at 4.5%. How much did Zuza borrow? - Cleaning 2
Maggie is looking to hire a carpet cleaning company. Cleaning Crew Inc. charges $24 for supplies and then $18 per room. If Maggie has $96 to spend on cleaning the carpets, how many rooms can she have cleaned? - Probability 42081 What is the probability of any two-digit natural number a) is divisible by seven, b) is divisible by nine, c) is not divisible by five.
- Number 42011
7/10 from number K is 28 What is the number K =? - Apartment building
Two hundred eight people live in the apartment building. There are as many women as there are men, but there are 22 more children than women. How many adults live in an apartment building?
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