Basic operations and concepts - math word problems - page 239 of 323
Number of problems found: 6446
- PIN code probability
Martin forgot the 4-digit PIN, and he remembered the first three numbers. The fourth number is odd. What is the probability in % that he will be able to determine the PIN? He has only one attempt. - Dice even probability
We roll the dice twice. What is the probability that if an even number falls for the first time, the even number will fall a second time? - People lineup probability
A group of n people, including Jano and Fero, randomly line up. What probability will there be exactly r people (r - Ball drawing probability
We have five red and seven white balls in a hat. What is the probability of pulling: a) a red ball? b) a white ball? - Task success percentage
Out of 30 tasks, Peter solved 24 correctly. Find success rate in percent. - Dice roll probability
We roll two dice, red and green. What probability will a more significant number fall on the red dice than on the green? - Twelve-position number system
Write the 12 largest five-digit numbers in the twelve-position system and the 12 smallest six-digit numbers. - Photo arrangement
Four girlfriends want to take a photo together. How many different ways can they stand side by side? - Seating rules
In a class, there are 28 seats, but in the 5.D class, there are only 24 students. How many ways can students sit? (The class has 14 benches. A bench is for a pair of students.) Result write down as powers of 10 - (logarithm - large number). - Bank interest percentage
Katka had € 660 in the bank, for which she received interest of € 33 at the end of the year. What percentage was the interest? - Drawing scale length
What is the actual length of the product in cm, which is 8 cm long on a 5:2 scale technical drawing? - Milk cream mixture
I want to turn to help with the following example. How do I reach an 8% solution? I need to mix 3.5% milk with 33% cream. Thank you for being so helpful. - Deposit interest rate
After a year of saving, a deposit of 500 euros, she had 512 euros. At what rate? - Tank filling calculation
Five 1800hl filling pumps in 3 hours for how long does a 4hl filling 1800hl tank? - Cable Digging People Days
In 12 days, ten people will dig a 3km cable car. In how many days will five people dig it up? - Gold extraction
There are 1.2 per mille of gold in the rock. How many grams of gold will they get from 45 tons of raw material? - Vehicle speed ratio
The speeds of two motor vehicles are in the ratio 7:4. How many kilometers will the slower vehicle travel simultaneously, if the faster vehicle travels 52.5 km? - Solution mixtures
We have 1 liter of 80% solution. Every hour, pour 1 dl of the solution, add 1 dl of water (a 0% solution), and mix. What percent solution will we have after two mixings? - Penny free fall
A man drops a penny from the top of a 500m tall building. After t seconds, the penny has fallen a distance of s meters, where s(t)=500-5t². Determine the average velocity between 1s and 5s. - Phone number
Ivan's phone number ends with a four-digit number: When we subtract the first from the fourth digit of this four-digit number, we get the same number as when we subtract the second from the third digit. If we write the four-digit number from the back and
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