Math practice for 13 year olds - page 117 of 414

Number of problems found: 8276

Mandarin bowl initial
When the lion took two mandarins from the bowl and Millie took one-fifth of the rest, four mandarins remained in the bowl. How many tangerines were initially on the dish?
The tempture
The temperature increased 13 °F between 6 AM and 3 PM. The temperature at 3 PM was 70 °F. What was the temperature at 6 AM?
Reverse percentages
A washing machine that is on sale has a price tag of R 1 240, representing a discount of 22.5% off the original price. What was the original price?
An amusement 2
An amusement park sells child and adult tickets in a ratio of 8:1. On Sunday, they sold 147 more child tickets than adult tickets. How many tickets did the amusement park sell on Sunday?
Baking a cake
Christy is baking a cake with a 9-inch diameter. She wants to cover the top with buttercream icing. How much icing will she need?
The average 5
The average of the two numbers is 9.5. One of the numbers is 11. What is the value of the other number?
Car opposite speeds
From cities A and B, which are 50 km apart, two cars set off in the same direction simultaneously with average speeds of 80 km/h and 120 km/h. How long will the faster car reach, the slower one, and at what distance from city A?
Tractor hectare plowing
Tractor drivers plow "h" hectares of land per day. How many hectares of land would they have to plow per day to plow the 585 ha area three days earlier than planned? For which "h" does this problem have a positive solution?
Two numbers
Numbers A and B differ by 95. If from number A we subtract two thirds of it, we get the same result as when we add three fifths to number B. Decide for each of the following statements whether it is true (T) or not (N). a) The larger of the two numbers is
Apple average weight
The basket contains five red apples with an average weight of 125 grams and one yellow apple. The average weight of all apples in a basket is 120 grams. Determine the weight of the yellow apple in grams.
Circle chord distance
The figure shows the circles k₁(S₁; r1=9 cm) and k₂(S2; r2 = 5 cm). Their intersections determine a common chord t 8 cm long. Calculate the center distance |S₁ S₂| in cm to two decimal places.
Temperature - change
The thermometer showed -2 °C in the morning. By lunch, the temperature had risen by 5 °C. The temperature had dropped by 13 °C till midnight. What temperature in °C did the thermometer show at midnight?
Mark Argie
Mark Argie has P11.50 more than Erwin. Together, the two boys have P131.50. How much does Mark Argie have?
Fertilizer water proportion
0.6 litres of fertiliser is mixed with 40 litres of water. How much fertiliser should be used per 10 litres of water?
Which 9
Which of the following temperatures is the coldest? A. 100 degrees Celsius B. 373 degrees Kelvin C. 32 degrees Fahrenheit
Grandma 9
Grandma bought 2 kilograms of apples at a CZK per kilogram, 5 kg of potatoes at b CZK per kilogram, and one celery for 12 CZK. She paid with three fifty-crown coins. ○ Depending on the values a and b, express in CZK the amount of change Grandma received.
Paper collection
A class with m pupils agreed that each pupil would collect k kilograms of paper. Before the collection began, one pupil moved away and did not hand over any paper. o In dependence on the quantities k, m express: a) how many kilograms of paper each pupil h
Prism height expression
The prism with a square base has a volume of 200 liters, and the length of its base edge is a decimeter. Using the corresponding expression of the prism, write the height of the prism in decimetres.
Target zone probability
The target is divided into three zones. The probability of a shooter hitting the first band is 0.18, the second band 0.2, and the third band 0.44. What is the probability that a) hits the target, b) miss the target?
Dice probability greater
What is the probability that the number a) greater than 4, b) Will the number greater than four fall on the dice roll?

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