Problems on H.C.F and L.C.M

Practice Problems on H.C.F and L.C.M – The L.C.M. of two numbers is 140. If their ratio is 2:5, then the numbers are:

Practice Problems on H.C.F and L.C.M – Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?

Practice Problems on H.C.F and L.C.M – If the sum of two numbers is 55 and the H.C.F. and L.C.M of these numbers are 5 and 120 respectively, then the sum of the reciprocals of the numbers is equal to

Practice Problems on H.C.F and L.C.M – If the sum of two numbers is 55 and the H.C.F. and L.C.M of these numbers are 5 and 120 respectively, then the sum of the reciprocals of the numbers is equal to

Practice Problems on H.C.F and L.C.M – If v,w,x,y, and z are non negative integers, each less than 11, then how many distinct combinations of (v,w,x,y,z) satisfy v(11^4) + w(11^3) +x(11^2) + y(11) + z =151001 ?

Practice Problems on H.C.F and L.C.M – The ratio between two numbers is 3 : 4. If their LCM is 180, then what are the numbers?

Practice Problems on H.C.F and L.C.M – Susan made a block with small cubes of 8 cubic cm volume. To make the block she used 3 small cubes long, 9 small cubes wide and 5 small cubes deep. She realizes that she has used more small cubes than she really needed. She realized that she could have glued a fewer number of cubes together to lock like a block with same dimensions, if it were made hollow. What is the minimum number of cubes that she needs to make the block?

Practice Problems on H.C.F and L.C.M – Perimeter of the back wheel =9 feet,front wheel=7 feet on a certain distance ,the front wheel gets 10 revolution more than the back wheel.what is the distance

Practice Problems on H.C.F and L.C.M – If the edge of a cube is increased by 3 cm, the volume will increase by 657 cm³. What then is the original length of each edge of the cube?

Practice Problems on H.C.F and L.C.M – A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weight 8g/cm^3 then the weight of the pipe is:

Practice Problems on H.C.F and L.C.M – Sum of volume of cylinder (S) and volume of cone (C) is 2190 cm2 & height of both cylinder and cone is same i.e., 10 cm. If radius of cone is 15 cm then find the ratio of radius of S to radius of C ?

Practice Problems on H.C.F and L.C.M – The section of a solid right circular cone by a plane containing vertex and perpendicular to base is an equilateral triangle of side 10 cm. find the volume of the cone?

Practice Problems on H.C.F and L.C.M – The straight line 2x + 3y = 12 passes through quadrant ?

Practice Problems on H.C.F and L.C.M – A solid metallic cube is melted to form five solid cubes whose volumes are in the ratio 1 : 1 : 8 : 27 : 27. The percentage by which the sum of the surface areas of these five cubes exceeds the surface area of the original cube is nearest to

Practice Problems on H.C.F and L.C.M – A ball of diameter 4 cm is kept on top of a hollow cylinder standing vertically. The height of the cylinder is 3 cm, while its volume is 9pi cubic centimeters. Then the vertical distance, in cm, of the topmost point of the ball from the base of the cylinder is