Reason - practice for 12 year olds - page 17 of 29
Number of problems found: 571
- David number
Jane and David train the addition of the decimal numbers so that each of them will write a single number, and these two numbers then add up. The last example was 11.11. David's number also had the same number of digits before and after a point. Jane's num - Granddaughter 4237
Mrs. Helena has an old cell phone with nothing to do but makes phone calls. The cell phone will discharge in 72 hours when fully charged and on the phone. Three hours of calling in a row are enough to discharge a fully charged phone. After the last full c - Equivalent 4205
They have their own money in the magical land, Fu, Ru, and Mu. Three Mu are equal to five Ru. Six Ru is equal to eighteen Fu. How many is Fu equivalent to one Mu? - Symmetry
Eva loves symmetry in shapes and numbers. Yesterday she invented an entirely new kind of symmetry - divisible symmetry. She wrote all five-digit numbers with different digits with the following property: The first digit is divisible by 1, the second by 2,
- Centimeters 4178
Find the surface of a block whose one wall is 48 centimeters square and the other wall is 30 centimeters square. - Flowers
The flower has six flowers, and each flower has a number. These are the numbers: 20,40,39,28,8,9. What number will be in the middle of the flower so that the numbers come from the flowers when we subtract and add? - Rings groups
Twenty-seven pupils attend some groups. Fourteen pupils attend the Dance group, 21 sports group, and 16 in the dramatic group. Dance and sporting attend nine pupils, dance and drama six pupils, sporty and dramatic 11 pupils. How many pupils attend all thr - Organizes 4152
Shepherd has less than 500 sheep. If he organizes them in 4 rows, he will remain three sheep. If he manages them in 5 rows, he will remain four sheep. If he arranges them in 6 rows, he will remain five sheep. But it can manage them exactly in 7 rows. How - Substituted 4151
Find out what numbers need to be substituted for the letters X, Y, and Z to have the following relation: XZY + XYZ --------- YZX
- Summands
Find two summands of the number 42 so that its product is minimized. - Transferred 4040
The cowboy has 25 horses in two pens. He transferred 5 from the first to the second, then sold 7 horses from the second. How many horses were originally in the first pen? In the first enclosure, there were just 2 times more horses than in the second enclo - Odd-numbered 4033
Mr. O. came up with two codes for the vault, which he alternates after a week. Both codes have the product of the digit 120. In an even week, it uses the smallest possible number as the code with this property. In the odd week, the largest. No number 1 in - Minutes 4009
One egg is boiled for 5 minutes. How many minutes will five eggs be cooked? - Apples and pears
Mom divided 24 apples and 15 pears among the children. Each child received the same number of apples and pears - the same number as their siblings. How many apples (j=?) and pears (h=?) were received for each child?
- Beginning 3930
Roland has 490 balls. If he gave 145 bullets to Marek, he would still have 100 more bullets than Marek. How many balls did Marek have at the beginning? How many shots do they have together? - Hazelnuts 3786
Denis eats 12 hazelnuts in 1 day. How many more hazelnuts must he eat a day to eat 57 hazelnuts in 3 days if he ate the same amount of nuts every day? - Friends
James and Jaroslav are friends. Together they had 48 toy cars. But if John had taken eight cars from Jaroslav, Jaroslav would have had 1.5 times more toy cars than James. How many toy cars had Jaroslav and James? - Divisibility
Write all the integers x divisible by seven and eight simultaneously, for which the following applies: 100 < x < 200. - Factory
In the factory, workers work in three shifts. In the first inning operates, half of all employees in the second inning and a third in the third inning 200 employees. How many employees work at the factory?
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