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Four Operations - Chapter # 02 (Multiplying by Tens)

https://www.youtube.com/watch?v=ZAc5AZRFMUc&t=146s

Primary Mathematics
Chapter-1
Topic: Prime Numbers

Areas Covered:
How to find the least common factor using Prime Factorization
The video contains explanations and solutions to practice problems as well.

https://www.youtube.com/watch?v=03GYldSZV3Q&t=29s

Primary Mathematics
Chapter-1
Topic:
The video is available in the comments

Areas Covered:
How to find the highest common factor using Prime Factorization
How to find the highest common factor using Division Method

Prime Numbers & Prime Factors Primary MathematicsChapter-1Topic: Prime NumbersAreas Covered:How to find the highest common factor using Prime FactorizationHow to find the highest common ...

Primary Mathematics
Chapter-1
Topic:
The video is available in the comments

Areas Covered:
How to identify Prime No. and No.
How to make prime with both Methods
Solved and explained practice questions.

Dear ,
The to the below word problems is available in the , the link is shared in a .

- The sum of two consecutive numbers is 93. Find the numbers.
- When a number is multiplied by 2 it gives the same result as when 6 is subtracted from three times the number. What is the number?
- If the perimeter of a rectangle is 18 in. and the width of the rectangle is 3in. less than its length. Find its length and width.
- If a number is subtracted from 12 and the result is divided by 3, the result is 2. What is the number?
- If 5 is added to a number and the result is multiplied by 4, it gives the same result as when it is multiplied by 6. What is the number?

Dear ,
The to the below word problems is available in the , the link is shared in a .

Question #1: Six times a certain number is 16 more than twice the number. Find the number.
Question #2: The length of a rectangle is 5m more than its width and the perimeter of the rectangle is 32m. Find the length and width of the rectangle.
Question #3: The length of a rectangle is twice its width, and the perimeter is 54m. Find its length.
Question #4: One number is bigger than the other number by 3 and the sum of these two numbers is 43. Find the numbers.
Question #5: Three times a number gives you the same result as when two are subtracted from the number. Find the number.

Dear ,
The to the below word problems is available in the , the link is shared in a .

- When a certain number is increased by 7, the result is 18. Find the number.
- When a number is decreased by 2 and the result is multiplied by 3, the final result is 24. Find the number.
- When 5 is subtracted from a certain number and the result is multiplied by 7, the final result is 63. Find the number.
- When a certain number is subtracted from 24 and the result is divided by 5, the final result is 4. Find the number
- The sum of three consecutive numbers is 63. Find the greatest number.

Dear ,
The to the below of "Ratio & Unitary Method" is available in the , the link is shared in a .

From the Beginning to 3.52 minutes
Question: A millionaire leaves 1.4 million dollars in his will to be shared between his three children in the ratio of their ages. If they are 24,28 & 32 years old. Calculate the amount they will each receive.

From 3.52 to 5.72 minutes
Question: Six people can dig a trench in 8 hours
a) How long would it take
1. With 4 persons
2. With 12 persons

From 5.72 to 6.86
b) How many people would it take to dig the trench in
1. 3 hours
2. 16 hours

From 6.86 to 7.93 minutes
Question: Chairs in a hall are arranged in 35 rows
a) How many rows would there be with 21 chairs to a row?

From 7.93 to 8.97
b) How many chairs would there be in each row if there were 15 rows?

From 8.97 till the end
Question: A worker in a sugar factory packs 24 cardboard boxes with 15 bags of sugar in each. If he had boxes that held 18 bags of sugar each, how many fewer boxes would be needed?

Dear ,
The to the below of "Ratio & Unitary Method" is available in the , the link is shared in a .

Video Break-up:
From the Beginning to 1.18 minutes
Question: 55% of students in a school are boys
A) What is the ratio of boys to girls?

From 1.18 to 2.73 minutes
B) How many boys & how many girls are there if the school has 800 students?

From 2.73 to 4.82 minutes
Question: The angles of a triangle are in the ratio of 3:5:4. Calculate the size of each angle

From 4.82 minutes till the end
Question: A small company makes a profit of $8000.This is divided between the directors in the ratio of their initial investments. If Alex puts $20000 in the firm, Maria $35000 and Almet $25000. Calculate the amount of the profit they will each receive

Dear ,
The to the below of "Ratio & Unitary Method" is available in the , the link is shared in a .

Video Break-up:
From the Beginning to 2.88 minutes
Question: A recipe uses 150g butter, 500g flour, 50g sugar, and 100g currants to make 18 small cakes.
a) How much of each ingredient will be needed to make 72 cakes.
b)How many cakes would be made with 1kg of butter

From 2.89 to 8.1 minutes
Question: A tulip farmer sells sacks of mixed bulbs to local people. The bulb develops into two different colors of tulips, red & yellow. The colors are packaged in a ratio of 8:5 respectively. Part a) If a sack contains 200 red bulbs, calculate the number of yellow bulbs
b) If a sack contains 351 bulbs in total, how many of each color would you expect to find.
c) One sack is packaged with a bulb mixture in the ratio of 7:5 by mistake. If the sack contains 614 bulbs how many yellow bulbs would you expect to have completed with a normal sack of 624 bulbs.

From 8.2 to end
Divide 72 in the ratio of 2:3:4

Dear ,
The to the below of "Ratio & Unitary Method" is available in the , the link is shared in a .

How to solve word problems using Ratio & Unitary Method
-1: A machine prints four books in 10 mins. How many will it print in 2 hours?
-2: A television set uses 3 units of electricity in 2 hours. How many units will it use in 7 hours?
-3: A farmer plants five apple trees in 25 mins. If he continues to work at a constant rate, how long will it take him to plant 200 trees?
-4: A car travels at an average speed of 80km/hr for 6 hours.
a) How far will it travel in the 6 hours?
b) What average speed will it need to travel at, in order to cover the same distance in 5 hours.