Examples for 7th grade (seventh)

Number of examples found: 1974

  • Customary length
    inch Convert length 65yd 2 ft to ft
  • Inscribed
    koule_krychle_1 Cube is inscribed in the cube. Determine its volume if the edge of the cube is 10 cm long.
  • Closest natural number
    numbers2_31 Find the closest natural number to 4.456 to 44.56 and to 445.6.
  • Brackets 2
    brackets Add parenthesis to make true: 5-2×6-4+2=5
  • Lcm simple
    lcm_gears Find least common multiple of this two numbers: 140 175.
  • Triangle
    eq_triangle Can be rectangular triangle equilateral?
  • Fraction + eq
    eq1 Solve following simple equation with fractions: -5/6(8+5b) = 75 + 5/3b
  • Ratio - proportion
    ratios2 Reduce the number 16 in proportion 3:2 5:4 11:8
  • Unknown number 6
    bonbons_7 Determine x if 1/6 of x is equal to 2/5 of the number 24.
  • Trapezoid
    rectangular_trapezoid Are diagonals in a rectangular trapezoid perpendicular and bisect the angles?
  • 1.5 divided
    eq2_3 1.5 divided by 1 = w divided by 4
  • LCM
    calc_icon What is the least common multiple of 5, 50, 14?
  • Book
    matematika_encyklopedia To number pages of thick book was used 4201 digits. How many pages has this book?
  • Simple equations
    enc2 Solve system of equations: 5x+3y=5 5x+7y=25
  • Lcm of three numbers
    prime What is the Lcm of 120 15 and 5
  • Expressions
    equation Expression (3a-7).(3a+7) is identical with: ?
  • Temperature increase
    teplomer_19 If the temperature at 9:am is 50 degrees. What is the temperature at 5:00pm if the temperature increases 4 degrees Fahrenheit each hour?
  • Digit sum
    numbers_41 Determine for how many integers greater than 900 and less than 1,001 has digit sum digit of the digit sum number 1.
  • Fraction
    1_3_fraction Determine for what x fraction ?:
  • Shots
    lopta_5 Determine the percentage rate of keeper interventions if from 32 shots doesn't caught four shots.

Do you have an interesting mathematical word problem that you can't solve it? Submit a math problem, and we can try to solve it.



We will send a solution to your e-mail address. Solved examples are also published here. Please enter the e-mail correctly and check whether you don't have a full mailbox.

Please do not submit problems from current active competitions such as Mathematical Olympiad, correspondence seminars etc...