Math Central - mathcentral.uregina.ca
Quandaries & Queries
Q & Q
. .
topic card  



list of
. .
start over

20 items are filed under this topic.
A total amount of $27,500 invested at 5% and 7% 2017-02-19
From Brad:
Kristina invests a total of $27,500 in two accounts paying 5% and 7% simple interest, respectively. How much was invested in each account if, after one year, the total interest was $1,645.00.
Answered by Penny Nom.
An investment for 20 months 2015-01-12
From rose:
Darnell wants to have 2700$ to purchase a tv in 20 months. what will he need to deposit today if he earns 5% annual interest compounded monthly
Answered by Penny Nom.
Three investment partners sharing the profit 2014-02-22
From Ayatullah:

We are three partners and bought a property at 2050000 and sold at 2300000.
Details of investment of the partners
X= 1500000
Y= 400000
Z = 150000

My questions are
1) How could i calculate percentage of investment of each partner?
2) How could i deduct 30% commission from each partner in profit?
3) How could i distribute the profit amongst the partners?

Thanks in advance

Answered by Penny Nom.
A one year investment 2011-07-01
From Jean:
If the yearly income from an investment is $30 and the annual interest rate is 12%,what is the original investment?
Answered by Penny Nom.
An investment of 500$ 2010-09-27
From georgia:
if you invest 500$ at a 7% annum and the balance at a 10% annum and your interest earned is 44$ annum how much was invested in the 7% and how much in the 10%.
Answered by Penny Nom.
Compound interest 2010-04-21
From Kenneth:
Let's say that an investor has $1000.00 to invest for 3 years at a rate of 5% at compound interest. Here is the formula:

M = 1000(1 + 0.05)^3 = $1157.62

If I want to change 1000(1 + 0.05) to (1000 + 0.05*1000) three times in a calculation instead of using (1 +0.05)^3, how would this be done?

I cannot get (1000 + 0.05*1000) + (1000 + 0.05*1000) + (1000 + 0.05*1000) to equal $1157.62.

I know that 1000(1.05)(1.05(1.05) will produce the answer, but I want to try to use the above non-factored calculation.

Answered by Penny Nom.
Investing in four accounts 2009-08-29
From Kenneth:
Hello: An investor wants to divide $1000.00 into four amounts or accounts -- one account earning 2%, the second account earning 5%, the third earning 9%, and the fourth earning 12%. He wants the overall total return to equal 5%. What are some of the monetary amounts that can be invested into these four accounts to earn him the 5% total return, 5% of $1,000.00?
Answered by Penny Nom.
Investing in multiple accounts 2009-06-26
From Kenneth:

If an investor has $1000.00 to invest in multiple accounts, and he wants a total return of 4%, is there one calculation that can be used to determine what these amounts could be even though there may be numerous amounts used as answers for most of the following examples?

For example,
Invest $1000.00 @ 2% and 5% for total return of 4%.
Invest $1000.00 @ 2%, 3% and 5% for total return of 4%.
Invest $1000.00 @ 2%, 3%, and 5% for total return of 4%.
Invest $1000.00 @ 2%, 3%, 4% and 5% for total return of 4%.

Answered by Robert Dawson.
Tara's game show winnings 2008-09-02
From David:
Tara paid one-half of her game-show winnings to the government for taxes. She invested one-third of her winning in Jeff's copy shop at 14% interest and one-sixth of her winnings in Kaiser's German Bakery at 12% interest. If she earned a total of $4000 on the investments in on year, then how much did she win on the game show?
Answered by Penny Nom.
What is the account value after 3 years? 2008-07-10
From Carlos:
Question Suppose that you deposited $3,000 at the beginning of each year for three years in a savings account earning 4%. What is the account value after 3 years (approx)?
a. 9,120
b. 9,211
c. 9,739
d. 9,989

Answered by Penny Nom.
An account that earns 6% annually 2006-03-01
From Christine:
How much do you have to deposit to an account that earns 6% annually if you want to earn $1200 on the account?
Answered by Stephen La Rocque.
$24,000 investment at 5% daily interest 2005-12-21
From Gary:
My friend is a professional day trader on the stock exchange. He claims that he can take a $24,000 investment at 5% daily interest and at the end of 3 years have approximately 34 million dollars. Can this be correct?
Answered by Penny Nom.
Fran goes to college 2005-08-21
From Thomas:
Fran will begin attending longview college 1 year from now and will attend for the next 4 years. Her annual cost will be $14,000.00 which her parents have agreed to pay. Frans parents have saved enough money to meet Frans needs. How much must they invest in an account paying 10% interest compounded annually in order to receive $14,000.00 at the end of each of the next 4 years, having nothing left in the account at the end of that time?
Answered by Penny Nom.
The benefits of saving for retirement 2005-03-11
From Nick:
A human resources department wants a report that shows its employees the benefits of saving for retirement. Produce a report that shows 12 predicted retirement account values for each employee - the values if the employee saves 5, 10, or 15% of his or her annual salary for 10, 20, 30, or 40 years. Assume that savings grow at a rate of 8% per year. Not really interested in answers, just the equations to solve the problems.
Answered by Penny Nom.
Choosing an investment 2004-06-09
From Max:
Let's say I have a list of different possible investements, and the list shows me my cost, and how much each investment will sell for.

In order to compare the investments and put them in order of relative profitability, I would want to sort them by their profits as percentages of what? Also, if each investment had an equal probability

of losing exactly 10% of the sell price before I sold would that have any relevance to the way I would calculate it?

Answered by Walter Whiteley.
Mr.Carter is very cautious 2003-11-26
From Bob:
Mr.Carter is very cautious. He decides to invest in only three stocks: one low stock, one high stock, one medium stock. Given that the expected annual yields are 6% for low stock, 7% for medium stock, and 8% for high stock, he wants his investment in medium stock to be half of his total investment in low and high stock. How much should I invest in each type fo stocks to expect a total annual return fo $650 form my investments?
Answered by Harley Weston.
Two investments 2003-02-07
From A student:
you have $7200 in principal and invest different sums @ 10% and 14%. You receive 920 at end of term. (one year)What amounts are invested at what rate?
Answered by Penny Nom.
Probability and investment 2002-05-19
From Bally:
Investors do not invest all their money in the investment predicted to be the best beuause it is too risky. an investor holds shares in three independent cmpanies. company A, Company B, compnay C. an analyst predicts the probability of profit increases for each company as follows. Company A:0.70 Compamy B:0.50 Compnay C:0.65

(a) If the analyst's predictions are true, what is the probability that all three comapanies show a profit incresse?

ANSWER: I try using vin diagram but it did'nt work, I dont know any other ways to solve this question

(b) if the analyst's predictions are true, what is the probability that at least one comany shows a profit increase?

Answered by Andrei Volodin.
Isolating an exponent 2000-09-24
From C. Scott:
Suppose you invest $500.00 in an account that pays 10% interest compounded annually. How long will it take for this value to triple?

A=p(1 + i)a A=1500 i=0.1
1500=500(1.1)a p=500 a=unknown

How do you solve this problem algebraicly? How do you isolate the variable (a) when it is an exponent?

Answered by Harley Weston.
Get rich quick 1999-12-02
From Holly Hutson:
If one cent were placed in an investment that doubles in value every day, what would be the value of the investment at the end of 30 days?
Answered by Penny Nom.



Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.



Home Resource Room Home Resource Room Quandaries and Queries Mathematics with a Human Face About Math Central Problem of the Month Math Beyond School Outreach Activities Teacher's Bulletin Board Canadian Mathematical Society University of Regina PIMS