Math Is Fun Forum

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

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I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

Excellent!

#7915. 'A' deposited $500 at a certain rate of interest and got $665.50 at the end of three years. If the rate of interest charged is compounded annually, find the rate.

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

Marvelous!

#7916. A sum of $10,500 is paid back in 2 equal annual instalments. Find the amount of each instalment if the rate of interest charged is 15% per annum compounded annually.

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

Excellent!

#7917. A and B can do a piece of work in 4 days. If A alone can do it in 6 days, in how many days can B alone complete the same piece of work?

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

Neat work!

#7918.

---

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

Neat work!

#7919. Given that the pth term of an Arithmetic Progression is 3p + 2, find the sum of 20 terms of the Arithmetic Progression.

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

#7919 revised. The sum of first five terms of an Arithmetic Progression is -10. Also, the ratio of the 8th term and that of 20th term is 1 : 4. Find the 35th term of the A.P.

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

Excellent!

#7920. A' invests an amount of money at 15% per annum. He calculates the difference between compound interest and simple interest on that sum to be $225 for 2 years. Find the amount of money invested.

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

Excellent!

#7921. A certain sum of money is lent out at simple interest amounts to $1380 is 3 years and $ 1500 in 5 years. Find the rate percent per annum.

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

#7922. $58,750 amounts to $79,900 in four years at simple interest. What is the rate of interest paid?

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

Neat work!

#7924. The difference between the interest received from two different banks on $500 for 2 years is $2.50. Find the difference between their rates.

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

Good work!

#7925. $5000 is lent partly at 12% per annum and partly at 14.5% per annum for 2 years. If the total income for 2 years is equal to $1250, find the amount of money lent at 14.5% per annum.

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

ganesh

Administrator

Registered: 2005-06-28

Posts: 33,015

Re: 10 second questions

Hi,

Splendid!

#7926. A certain sum of money doubles itself in 5 years at simple interest. In how many years will it become ten times?

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It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

irspow

Member

Registered: 2005-11-24

Posts: 1,055

Re: 10 second questions

---

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.