Maths practice for 12-year-olds - page 291 of 359
Number of problems found: 7167
- Speed limit
The maximum allowed speed in the village is 50km/h. The police measured that the car crossed the 800 m long section in 40 seconds. Was the driver fined for exceeding the speed limit? - Equation solutions
The solution to the equation 3x = 8x is a / no real number b / x = 8/3 c / x = 3/8 d / x = 0 e / infinitely many solutions - Bus intervals
Four bus lines departed from the terminal together at 5:00 AM. Line A runs at 15-minute intervals, Line B at 6-minute intervals, Line C at 20-minute intervals, and Line D at 8-minute intervals. At what time do all four lines depart from the terminal simul - Elevator
The panel house has ten over-ground stories and four underground. The lift goes from the ground floor to the 2nd floor, then down to the 3rd underground floor, nine floors up, and finally four floors down. To what floor does the elevator arrive? How many - Grandmother
A grandmother wants to divide candies among her grandchildren. If she gives five candies to each, she is three short. If she gives four candies to each, she has three left over. How many grandchildren does she have, and how many candies does she have? - Toothpaste duration
A full tube of toothpaste is enough for one family member for six weeks. How long will three family members last? - Airport
Planes on route A depart from the airport every third day and on route B every fourth day. On 5 May, planes on both routes departed. Will planes depart on the same day again this month? If so, when? On what date in June will planes depart on both routes? - Typing time
A typist with an average speed of 250 keystrokes per minute can type a text in 16 minutes. How many minutes longer would it take to type the same text at an average speed of 200 keystrokes per minute? - Tree height
A tree with an unknown height casts a shadow 18 m long at a time, while a two-meter pole casts a shadow of 2.4 m. How tall is the tree? - Seawater salt
By evaporating 15 kg of seawater, we get 517.5 g of salt. How much seawater do we need to obtain 3.45 kg of salt? - Cuboid - edges
The cuboid has dimensions in a ratio of 4:3:5. The shortest edge is 12 cm long. Find: The lengths of the remaining edges The surface of the cuboid The volume of the cuboid - Pool filling
The swimming pool is filled with four inflow pipes in 9 hours. If one tributary is broken, how long will it be filled? - Loom weaving
The master calculated that six looms would weave the ordered fabric in 15 hours. One condition appeared. How long before the ordered substance matches the remaining states? - Hay supply
Hay stock is enough for four horses for 60 days. How long would this supply last for ten horses? - Biscuit icing
There are 200 biscuits in the box. Chocolate and sugar icing were used to decorate them. Chocolate was used on 157 biscuits and sugar on 100 biscuits. How many biscuits had both toppings? - PIN attempts
How many attempts do I need to guess the 3-digit PIN to be sure I can guess it? - Cost reduction
Windbreaker cost after discounted SKK 1275, which was 3/4 of the original price. How many SKK originally cost windbreaker? How many SKK was the cost reduced? - Pool inlets
At the swimming pool, they usually use three tributaries with the same power to fill the pool. Then the pool will fill in 5 hours. How many hours less would it take to fill the pool if they added 2 more inlets with the same capacity? - City gates
There are eight places in Budan, some of which are connected by roads. There is a gate at every point where the road leaves or enters the city. No two paths intersect or enter through the same entrance. The number of gates matches one of the numbers 5,15, - Petrol consumption
Two identical cars use 12 l of petrol to cover 150 km. How much gasoline do 25 similar cars use per 1800 km?
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