Maths practice for 12-year-olds - page 325 of 351
Number of problems found: 7015
- angles in quadrilateral
What size have angles in quadrilateral (4-gon) if they are in a ratio of 8:9:10:13? - Salt
One ton of seawater contains 25 kg of salt. How many tons of seawater must be evaporated to obtain 2 q of salt? - Sisters
Sisters Janka and Danka have 220 CZK saved together. She wants to take a fifth of her savings and Danka's quarter on a trip to Janka. Then, they will have 50 CZK on the trip. How much money did Janka and Danka have? - Class
The class has 18 students. Everyone knows inline skating or skateboarding. Inline skating can ride 11 students on a skateboard 10. How many ride-on inline skates and a skateboard? - Double-track
On double-track express met with a freight train. Express travel at a speed of 72 km/h, and a freight train at a speed of 36 km/h. After what period will it be from 9 km apart? - Ladder 2
The ladder 9.8 meters long is positioned in the well such that its lower end is distanced from the wall of the well 1.2 m. The upper part of the ladder is supported on the upper edge of the well. How high is the well? - Metal alloy
What is the metal ratio in the alloy in the 50 tonnes of steel to 30 kg nickel? - Jane
Jane buys gifts together for 464 SKK. She pays 4.5 times less for the tie than for the shirt, but 56 SKK more for the socks. Thus, she pays 464 SKK for each item in the gift. - Athletes
Athletes are standing in rows of eight. Ivan estimated that there are more than 120, while Peter claimed that there are fewer than 130. Both are right. How many are athletes? - Parachutists
During freefall, parachutists were first held in groups of 4, then 6, then 9, 12, and finally 18 members. If each group must all be involved, how many parachutists must jump at least? - Log
The worker cut his thick log into six pieces for 30 min. How long did he cut the log to 12 pieces? - Rhombus 2
Calculate the rhombus area with a height v=48 mm and shorter diagonal u = 60 mm long. - Scale 3
Miriam's room is 3.2 meters wide. It is drawn by a line segment length of 6.4 cm on the floor plan. On what scale is the plan of the room? - Water level
How high is the water in the cylindrical barrel with a diameter of 12 cm if there is a liter of water? Express in cm with an accuracy of 1 decimal place. - Barrel 3
The barrel with water weighs 118 kg. When we get off 75% of water, it weighs 35 kg. How many kg has an empty barrel? - Wheels
A small tractor wheel with a diameter of 60 cm must be rotated eight times to overcome some pathways. How many times must you turn the big tractor wheel with a radius of 60 cm to overcome the same distance? - Mushrooms
For five days, we collected 410 mushrooms. Interestingly, we collected ten mushrooms more every day than the preceding day. How many mushrooms have we collected during the 4th day? - Divisible by 5
How many three-digit odd numbers are divisible by 5, which is in place of ten's number 3? - Raffle
How many raffle tickets must be purchased by Peter in a raffle with issued 200 tickets if he wants to be sure to win at least a third price? The raffle draws 30 prices. - Three-fifths 1651
Anna bought something for one-third of her savings. She spent three-fifths of the remaining money on her parents' gifts. She has 400 euros left now. How many euros did she save before spending?
Do you have unsolved math question and you need help? Ask a question, and we will try to solve it. We solve math question.
