Math practice for 13 year olds - page 356 of 362
Number of problems found: 7234
- Map
Forest has an area of 36 ha. How much area is occupied by forest on the map at scale 1:500? - Wire
One pull of wire is reduced by its diameter by 14%. What will the wire diameter be with diameter 19 mm over 10 pulls? - Estate
An estate-shaped rectangular trapezoid has bases long 35 m, 65 m, and perpendicular arm 34 m. Calculate how long its fence is. - Raffle
In the pool number from 1 to 115. What is the probability that a randomly selected number is not prime?
- One half
One-half of 2 63 is: ... - Strange x
For what x is true x=19x? - Gauss
Help little C.F. Gauss sum all the integers from 1 to 400. - Circumscription
Calculate the radius of the Circumscribed circle in the rectangle with sides 20 and 19. Can it be a rectangle inscribed by a circle? - Money
Everyone complains about the lack of money. There is no shortage of money but a relative scarcity of goods and things people buy for the money. Calculate what percentage of the price of all goods and services immediately rose if everyone has the day-to-da
- Sphere
The sphere's surface is 28500 cm², and the weight is 34.2 kg. What is its density? - Shots
500 lead shots with diameter 4 mm are decanted into a ball. What is its diameter? - Height
Is it true that the height is less or equal to half of the hypotenuse in any right triangle? - Octagon
We have a square with a side 56 cm. We cut corners to make his octagon. What will be the side of the octagon? - Diofant 2
Is equation 1140x +876y = 48 solvable on the set of integers Z?
- Diofant equation In the set of integers (Z), solve the equation: 212x +316y =0 Write result with integer parameter t in Z (parameter t = ...-2,-1,0,1,2,3... if equation has infinitely many solutions)
- Reciprocal
It is true (prove it) that if a > b > 0: (1)/(a)< (1)/(b) - Euler problem
Someone buys 300 tolars towels. If it were for the same money of 5 more towels, it would be 5 tolars cheaper each. How many towels were there? - Binomials
To binomial 36x²-168x, add a number to the resulting trinomial be square of the binomial. - Powers
Is it true for any number a,b,c,d equality:? (a-b-c-d) 6 = (d+c+b-a) 6
Is it equal following terms? -9 21 = (-9) 21Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
