Math Is Fun Forum

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,415

Re: 10 second questions

Hi bobbym,

The solution to 2198 and 2199 are correct. Good work!

#2200. Find the sum of 11+13+.......+35.

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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: 48,415

Re: 10 second questions

Hi bobbym,

The reply to 2200 is correct. Well done!

#2201. 1[sup]2[/sup] + 2[sup]2[/sup] + ......... + 20[sup]2[/sup].

#2202. 1[sup]3[/sup] + 2[sup]3[/sup] + .......... + 20[sup]3[/sup].

---

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;

Congratulations on your 6000!

---

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: 48,415

Re: 10 second questions

Thank you, bobbym!

I were unable to reach 6000 posts without your help.

The problems 2201 and 2202 are solved correctly.

#2203. Find the total number of rectangles (including squares) in a chess board.

#2204. Express 0.24141414141..... as a fraction.

---

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: 48,415

Re: 10 second questions

Hi bobbym,
The solutions to 2203 and 2204 are perfectly right! Outstanding!

#2205. The first term of an infinite Geometric Progression is 6 and its sum is 8. Find the GP.

#2206. The sum of an infinite GP is 4 and the sum of the cubes of the terms is 192. Find the common ratio.

---

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: 48,415

Re: 10 second questions

Hi bobbym,
,
The solutions to 2205 and 2206 are perfectly right! Fantastic!

#2207. Find the Greatest Common Divisor of 25, 35, 45.

#2208. Find the GCD of 36, 48, 144.

---

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: 48,415

Re: 10 second questions

Hi bobbym,

The replies to 2207 and 2208 are perfectly correct. Marvelous!

#2209. A fair die is rolled. Find the probability of getting
i) 3 on the face of the die
ii) an odd number on the face of the die
iii) a number greater than 1 on the die
iv) prime factors of 6 on the die.

---

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: 48,415

Re: 10 second questions

Hi bobbym,

The reply to 2209 is correct. Very well done!

#2210. One card is drawn at random from a shuffled pack of 52 cards. What is the probability that it will be (1) a spade (2) a black card (3) a king (4) any card except queen.

#2211. Two coins are tossed simultaneously. What is the probability of getting two heads?

---

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: 48,415

Re: 10 second questions

Hi bobbym,

The solutions to 2210 and 2211 are correct. Good job!

#2212. An integer is chosen at random from 1 to 50.Find the probability that the number is divisible by 5.

#2213. There are 5 items defective in the sample of 25 items. Find the probability that an item chosen at random from the sample space is not defective.

---

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.

santhosh

Member

Registered: 2010-07-19

Posts: 14

Re: 10 second questions

(1) Is 1298045602 a perfect square?

(2) Is 6719247 a prime number?

2 ans is 19

santhosh

Member

Registered: 2010-07-19

Posts: 14

Re: 10 second questions

Hi bobbym,

The solutions to 2210 and 2211 are correct. Good job!

#2212. An integer is chosen at random from 1 to 50.Find the probability that the number is divisible by 5.

#2213. There are 5 items defective in the sample of 25 items. Find the probability that an item chosen at random from the sample space is not defective.

2212 ans is 1/5=0.2

santhosh

Member

Registered: 2010-07-19

Posts: 14

Re: 10 second questions

Hi bobbym,

The solutions to 2210 and 2211 are correct. Good job!

#2212. An integer is chosen at random from 1 to 50.Find the probability that the number is divisible by 5.

#2213. There are 5 items defective in the sample of 25 items. Find the probability that an item chosen at random from the sample space is not defective.

2212 ans is 1/5=0.2

2213 ans is 0.5 or1/5

santhosh

Member

Registered: 2010-07-19

Posts: 14

Re: 10 second questions

giv me reply my ansrs are write or wrong i
f any wrong giv me correct sol

santhosh

Member

Registered: 2010-07-19

Posts: 14

Re: 10 second questions

(1) Is 1298045602 a perfect square?

(2) Is 6719247 a prime number?

2 ans is 19

giv me tips for solving this q's in short time

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: 10 second questions

Hi santhosh;

giv me tips for solving this q's in short time

You can answer both #1 and #2 quickly. But I don't see your answers here are mine.

---

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.

santhosh

Member

Registered: 2010-07-19

Posts: 14

Re: 10 second questions

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

santhosh

Member

Registered: 2010-07-19

Posts: 14

Re: 10 second questions

Hi santhosh;

giv me tips for solving this q's in short time

You can answer both #1 and #2 quickly. But I don't see your answers here are mine.

tank u very much

santhosh

Member

Registered: 2010-07-19

Posts: 14

Re: 10 second questions

(5) In the realm of whole numbers, apart from zero and one, which the smallest number which is both a perfect square and a perfect cube?

(6) What is the angle between the hands of a clock when the time is 8.00?

(7) What is the side total of a 3X3 magic square with numbers from 1 to 9?

(8) How many zeros does a trillion (US) contain?

(9) What are the common factors of 111, 222, 333, 444, 555, 666, 777, 888, and 999? (Four of them)

(10) How many furlongs is a mile?

how we gwet 15 as ansr