Math Is Fun Forum

santhosh

Member

Registered: 2010-07-19

Posts: 14

Re: 10 second questions

for 7 q?

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

This is a well known one:

All rows columns and diagonals should sum to 15. But I am not sure what a side total is.

http://www.mathematische-basteleien.de/magsquare.htm

You should try work on these yourself. In a truly szen like experience, it doesn't matter whether you solve the problem or not, the trying is the key!

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

giv me ansr 4 What is so special about the number 2.7182818284.... to mathematicians

This one you can look up for yourself. Try googling for it. Google is your friend!

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym,

The replies to 2212 and 2213 are perfect. Neat job!

#2214. If three coins are tossed, then what is chance of getting exactly one head?

#2215. Four coins are tossed simultaneously. What is the probability of getting exactly one tail?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym

The replies to 2214 and 2215 are perfectly. Well done!

#2216. What is the probability that
(i) a leap year selected at random will contain 53 Sundays.
(ii) a non-leap year selected at random will contain 53 Sundays.

#2217.  Two dice are thrown. What is the probability of getting
(i) the same number on both dice
(ii) a total of face number 12.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym,

The solutions to 2216 and 2217 are perfect. Congratulations!

#2218. Three dice are rolled once. What is the chance that the sum of the face numbers on the three dice is greater than 15?

#2219. A point is chosen at random inside a circle of radius 2. What is the probability that this point is nearer to the centre than to the circle.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym,

The solutions to 2218 and 2219 are perfect. Keep it up!

#2220. Find the equation of a straight line parallel to x-axis and passing through the point (-3,2).

#2221. Find the equation of a straight line parallel to y-axis and passing through the point (-7,5).

#2222. Find the equation of a straight line whose inclination with x-axis 60 degrees and passes through the origin.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym,

The solutions 2220, 2221 and 2222 are correct. Great work!

#2223. Find the equation of a straight line whose inclination is 30 degrees with the x-axis and whose y-intercept is -3.

#2224. Find the equation of a straight line whose slope is 3/4 and y-intercept is -4.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym,

The solutions to 2223 and 2224 are perfect. Very good!

#2225. Find the equation of the straight line through (1,3) and parallel to a straight line 5x-3y+1=0.

#2226. Find the equation of a straight line through (0,7) and perpendicular to a straight line 5x+4y+11=0.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym,

The solutions to 2225 and 2226 are perfect. Brilliant!

#2227. The vertices of a triangle are (1,2), (-3,4) and (5,-3). Find the equation of the altitude from (1,2) to the opposite side.

#2228. Find the equation of the perpendicular bisector of the line joining the points A(1,7) and B (-3,3).

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym,

The solutions to 2227 and 2228 are correct. Well done!

#2229. Find the equation of the straight line which joins the points A(5,1) and B(-2,2).

#2230. The vertices of a triangle ABC are A(-2,8), B(1,2) and C(7,-8). Find the equation of the median through A.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym,

The solution to 2229 correct.However, the solution to 2230 is 11x+6y-26=0.

Well done!

#2231. Show that the points (4,2), (7,5), and (9,7) are collinear.

#2232. If the straight line 7x-5y=k passes through the points (1,1) what is k?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi ganesh;

Sorry about # 2230, must have made an arithmetic mistake somewhere. Yep, checked it you are correct.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym,

The problems to 2231 and 2232 are solved correctly. Well done!

#2233. In an Arithmetic Progression the sum of the first 7 terms is 10 and that of the next 7 terms is 17. Find the AP.

#2234. How many terms of the AP 3,7,11,........ are needed to yield the sum 1275?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 46,335

Re: 10 second questions

Hi bobbym,

The problems 2233 and 2234 are solved correctly. Excellent!

#2235. Find the sum: 3 + 11 + 19 + .... 787.

#2236. Find the sum of all the numbers between 300 and 500 divisible by 11.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi ganesh;

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.