Addition - practice for 14 year olds
Number of problems found: 142
- Tricky result
Classic adding with percentages: Evaluate 28% of 450 + 45% of 280 - Human population
The populations of two cities after t years can be modeled by -150t+50,000 and 50t+75,000. What is the difference in the populations of the towns when t=4? - The average 12
The average of the first five numbers drawn was 2499. the first four numbers were 4165, 320, 7142, and 64. What was the fifth number? - Addition method
Solve for the variables by substitution or addition method: x + 3y = 19 5x + 3y = 35
- The average 10
The average of three fractions is 2 3/8. If two of the fractions are 2 1/5 and 1 2/3, what is the total value of the three fractions? - Coordinates - rectangle
Find the perimeter of the rectangle with vertices A(1,4), B (1,0 ), C (4,0), D (4,4 ) - The temperature 46
The temperature in Mumbai at 5 AM is 25 degrees Celsius. It rises 3 degrees Celsius every hour for the next two hours and then 5 degrees Celsius per hour for the next 3 hours. What is the temperature after 5 hours? - Xero had
Xero had a piece of ribbon. He used 0.4 of it to tie 2 small boxes and 2 large boxes. The length of ribbon needed for a large box is 3 times the length of ribbon needed for a small box. Xero used 5/6 of the remaining ribbon to decorate the presents. a) Wh - A goat 2
As shown, a goat is tied at one corner of a rectangular shed by a 5-meter-long rope. The shed measures 3 m by 2 m and is surrounded by grassland. What is the area of the grassland in which the goat can graze? Give your answer to the nearest m².
- AP with variables
What is the second member in the arithmetic sequence with 7 terms, whose first and last terms are x+2y and 7x-4y - A trail mix
Diego is making a trail mix for him and his friends to take with them on a hike next week. He mixes 4 2/6 pounds of mixed nuts, 3 3/6 pounds of peanuts, and 2 3/6 pounds of chocolate chips. How many 1/3-pound bags of trail mix can he make? - Heads and legs 2
There are a number of unspecified numbers of cows and hens in a den. If there are a total of 30 heads and 80 legs in the den, find the number of cows and hens in the den. - Dataset: 2
Dataset: 4, 9, 7, 8, 5, 2 a. What number is n in xn? b. Find ∑x c. Find ∑(x-2)2 d. Find √∑(x-2)²/6 - The sum 35
The sum of the two numbers is -20. One number is 3 more than the other one. Find the numbers.
- Decimal numbers
When two decimal numbers are multiplied, the answer is 0.072. When the same two decimal numbers are added, the answer is 0.72. What are the two decimal numbers? - The sum 31
The sum of two fractions is 13 3/4. Their difference is 8 1/5. What are fractions? - Daughter 82977
The ages of the father, mother, daughter, and son are in the ratio 11:9:3:2. The mom is 36 years old. What is the sum of their ages? - Determine 82975
Determine the sum of all positive odd numbers less than 78 - Calculate 82845
Calculate the sum of the first 9 terms of the geometric sequence if a3 equals 2 and a4 equals 8.
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