Interesting Area Question

Find the shaded area

Interesting Questions on Basic groups and idea of "equal"

Have fun!

Working backwards, with explanations.

Solution to,

John and Mary had some cookies at first. John gave 2/7 of his cookies to Mary. In return, Mary gave 1/4 of her cookies to John. In the end, John and Mary had the same number of cookies. What was the ratio of John's cookies to Mary's cookies at first?

with explanations.

Example of Working Backwards (Accounting for Events)

Heres an example of how you can account for events that happened in a Question.

John and Mary had some cookies at first. John gave 2/7 of his cookies to Mary. In return, Mary gave 1/4 of her cookies to John. In the end, John and Mary had the same number of cookies. What was the ratio of John's cookies to Mary's cookies at first?

Have fun.

Solutions To "Transfer" Questions in "Genesis"

These are the solutions to the questions.

Hope these helps.

If you have any other enquiries on these, feel free to drop me a mail at helpingsgkidswithmath@gmail.com

Also if you have any other Primary School Math Problems feel free to drop me a mail as well.

 

The 4 Cases of "Transfers"

Here are the diagrams to represent the 4 cases for transfers that i have mentioned in the post "Genesis"

Hopes this helps you to explain the different scenarios of "transfers" to your child.

Question Example with Solution 2

Heres another similar question which requires similar concept to the previous post.

A had 60 more stamps than B. they each gave some of their stamps to their friends.the number of stamps B gave away was 2/5 of the number of stamps A had at first. The number of stamps A gave away was 2/3 of the number of stamps B had at first. both had an equal number of stamps left. How many stamps did A had at first?

Since A has 60 more than B at first,

A has to give away 60 more stamps compared what B gave away in order for them to be left with equal amount in the end.

Since A gave away 2/3 of B and B gave away 2/5 of A,

2/3 of B is 60 more than 2/5 of A.

With the aid of a model,

2 units = 150

1 unit = 75

5 units = 75 x 5 = 375

Ans: 375 stamps