Math practice for 13 year olds - page 76 of 422
Number of problems found: 8424
- Right-angled 81359
The paths in the park form a right-angled triangle, which on the map with a scale of 1:200 has two dimensions of side lengths of 9cm and 15cm. Grandma walks this route every day for a health walk. How many meters does she walk? - Discount 81342
Price before discount 1800. Price after discount 1500. Discount by %. % off - Revolutions of cylinder
The rotating cone has a volume of 120 dm³. How tall is a cylinder of revolution with the same volume as a cone of revolution? - 100-liter 81334
In the morning, the waiter has 200 glasses with a volume of 0.3 liters and 100 large glasses with a volume of 0.5 liters each. He starts tapping into those glasses from the 100-liter barrel. In the evening, he will have half of the small beers and a fifth - Participants 81331
Two hundred fifty-two participants signed up for the classical ballroom dance course. There were 2 times more girls than boys. How many girls and how many boys applied? - Several resistors
We have a box with the same resistors, so all of them have a resistance value of 200 ohms. Draw the connection of several resistors so that the resulting resistance is: a) 100 b) 120 (only 4 resistors) - Container 81318
The warm liquid in the container reduced its volume by 2/27 after cooling By what percent was the warm liquid's volume greater than the cooled liquid's? - Cities 81317
The cities are 400 km apart; how many cm is it on a 1:400,000 scale map? - Lollipops 81314
There are lollipops, candies, and candies in the basket. The number of lollipops and candies is in the ratio of 2:3, and the number of candies and candies is in the ratio of 4:5. There are 15 fewer candies than lollipops and candies combined. How many can - Remaining 81308
Dana read the book in 4 days. On the first day, she read a third of the book; on the second day, a sixth of the book; on the third day, half of the remaining pages. She still had 30 pages left on the last day. How many pages was the whole book, and how ma - In 20
In 20 years, the father will be twice as old as he was five years ago. How old is a dad now? - Percentage 81297
There are 13,000 spectators in the stadium. Five thousand eight hundred fifty sat. What percentage was seated? - Percentage 81296
Milan saved 120 euros per year, and Eduard saved 150 euros. By what percentage did Eduard save more? - Forty-four 81295
Three hundred forty-four women are employed at the GUMÁR plant. The remaining 57% of employees are men. How many employees does the entire GUMÁR plant have? - Construction 81294
The first group of construction workers would build a certain section of highway in 15 weeks, and the second group would make it in 10 weeks. After four weeks of working together, the second group was dismissed, and only the first group continued to work. - Respectively 81293
The figure shows the squares ABCD, EFCA, CHCE, and IJHE. Points S, B, F, and G are, respectively, the centers of these squares. Line segment AC is 1 cm long. Determine the area of triangle IJS. Please help... - Telephone 81292
The merchant bought 5 telephone exchanges and 10 faxes for 8,500 euros. How much did he sell them for if the sale price was 30% higher than the purchase price? - One-fifth 81290
One-fifth of the bridge pillar is embedded in the ground. One-third of its length is in the water, and 1.4 m protrudes above the surface. Determine the length of the bridge pillar. - Individual 81289 The rod was divided into three parts. The first part measured one-third of the length, the second one-third of the rest, and the third part was 20 cm. Calculate the rod's original length and the individual parts' lengths.
- Vegetables 81242
I spent a tenth in the store on vegetables and 3 times more on sweets. I have 60 euros left. How many euros did I have?
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