Reason - practice for 12 year olds
Number of problems found: 187
- Numbers 72404
How many numbers are less than 200, the digits sum of which is 6? - Polya's method
On the way home from school, Dora likes to eat cookies. One daytime, just as she reached into her backpack, Swiper jumped into her path and grabbed her bag. It stole half of her cookies plus two more. A bit shaken, Dora continued home. Before she had a ca - Rectangles 70304
How many rectangles whose side lengths are expressed in natural numbers have an area of 96 cm²? - Determine 69304
Determine the size of the ACF angle in the regular ABCDEF hexagon. - Three-digit 69114 How many three-digit numbers have a digit sum of 6? Write the ratio of the number of created even and odd numbers and adjust it to the basic form.
- Two-digit 68654 List all compound positive two-digit numbers whose greatest common divisor with the number 51 is the number 17.
- Divisible 68644 List all divisible numbers by six and seven and are greater than 79 and less than 91.
- Expression 66754 Find the largest natural number n for which the value of the expression (37-2n) / 3 is equal to the natural number.
- Contains 66184 Which natural number contains 12 thousand, 15 hundred, 21 tens, and 11 units?
- Dolls
Dorotka cut the doll's way out of two batches. She was always left with one more doll with every two dolls cut out. How many dolls did they cut in total if the number counted 16 of them in the first cut out? - Mr. Product
The product of the ages of all of Mr. Product children's is 1408. The age of the youngest child is equal to half the age of the oldest child. How many children does Mr. Product have and how old are they? - Dividing
When dividing the tangerines into packages of 8 or 10, one always remained. How many were there if there were more than 250 and less than 300? - Three-digit 56441
Determine the number of all natural three-digit numbers divisible by 9, consisting of the numbers 0, 1, 2, 5, 7: - Lcm = 22 + gcd
The least common multiple of two numbers is 22 more than their greatest common divisor. Find these numbers. - 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 - When 5
When 5 is subtracted from both my numerator and denominator I become 3/4. What fraction i am? - Mr Duma
Mr Duma recently inherited a rectangular plot, part of the estate left by his late father. The plot with the following dimensions: Length=2x+1;Width=x-1. Determine the formula, in terms of x, that best describes the area of the rectangular plot. He has pl - Divide an isosceles triangle
How to divide an isosceles triangle into two parts with equal areas perpendicular to the axis of symmetry (into a trapezoid and a triangle)? - Passengers 45501
During the rescue of the sinking ship, the passengers were divided into three boats in a ratio of 3: 4: 5. There were 15 passengers in the first boat. How many passengers were rescued together? - We bought
We bought 140 fruit, 196 chocolate and 84 caramel lollipops. How many of the same packages can we prepare from them?
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