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When you invest different portions of your money and get different rates of return (in this case simple annual interest), your overall rate of return can be calculated as a weighted average, where the portion in each investment is the weight for that interest. In this case, the weighted average will...
- by Avi_Gutman
Thu Nov 29, 2012 9:00 am- Forum: Problem Solving
- Topic: David used part of $100,000 to purchase a house
- Replies: 4
- Views: 3850
When you have to find the factors of a number, start by finding the 'prime box' of that number (how many of each prime factor does the number have). 210=70x3=7x10x3=7x2x5x3 So 210 has one of each of the following: 2,3,5,7. Now, we need to figure out how many combinations we can make of 3,5,7 (we're ...
- by Avi_Gutman
Thu Nov 29, 2012 8:46 am- Forum: Problem Solving
- Topic: How many of the factors of 210 are odd numbers
- Replies: 2
- Views: 4771