Math practice for 13 year olds - page 144 of 428
Number of problems found: 8558
- The sum 16
The sum of A and B is 36. The difference between A & B is 8. Find the larger number. - Multiplicative inverse
Explain why the reciprocal of - 1 1/17 is the multiplicative inverse of - 17/18. - Two fraction equation
Find the d value of q in equation 30/16=q/48. - Insurance 2
A house valued at 255,000 euros has been insured for 224,000 euros. What percent has it been insured? - A class IV.C
In a class, 2/5 were boys. Thirty were girls. How many more girls than boys are there? - Calculate 20
Calculate the sum of 1/5 of a right angle, 3/4 of a right angle, and 3/4 of a straight angle. - Comparing exponents
A) 8 (6²)(8²) b) 16 (6²)(8²) c) (6¹+²) (8²) - Over fraction
Solve an equation: p over 5 equals fraction numerator 7 p over denominator six end fraction plus 5. - Regular price
The sale price of a television is 7200. The discount rate is 40%. Find its regular price. - Taken away from number
18 is taken away from 8 times, and the number is 30. Find the number. - The average 4
The average cost price of a car in Ireland is now €26,430, excluding VAT. If VAT is 23%, calculate the actual selling price of a car in 2021. - The sum 13
What is the sum of the exponents of the prime factors in the prime factorization of 196? - Sum and product
The sum of the real numbers x and y is 12. Their difference is 8. What is the value of xy? - Points OPQ
Point P is on line segment OQ. Given OP = 6, OQ = 4x - 3, and PQ = 3x, find the numerical length of OQ. - A trapezoid 3
A trapezoid ABCD has a base length of a = 120 mm, c = 86 mm, and an area A = 2,575 mm². Find the height of the trapezoid. - Ferdinand
Ferdinand went from place A to place B and from there to place C. A is 7.2 km from B, and B is 11.7 km from C. Albert went from place A to place D and from there to place C. D is 9.1 km from A and C is 10.8 km from D. Who traveled more and by how much? - The largest divisor The largest number which divides 60 and 75 leaving remainders 8 and 10 respectively is:
- Trapezoids
In the isosceles trapezoid ABCD we know: AB||CD, |CD| = c = 8 cm, height h = 7 cm, |∠CAB| = 35°. Find the area of the trapezoid. - Diagonals of rhombus
Find the length of the diagonal AC of the rhombus ABCD if its perimeter P = 112 dm and the second diagonal BD has a length of 36 dm. - One of
One of the internal angles of the rhombus is 120°, and the shorter diagonal is 3.4 meters long. Find the perimeter of the rhombus.
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