Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi bobbym,

The solutions #4179 and #4180 are correct. Good work!

#4181. Find the Least Common Multiple of 18, 24, 60, and 150.

#4182. Three numbers are in the ratio 1 : 2 : 3 and their Greatest Common Divisor is 12. What are the numbers?

Character is who you are when no one is looking.

**Online**

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,964

Hi;

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi bobbym,

The solutions #4181 and #4182 are correct. Good work!

#4183. The average of 7 consecutive numbers is 20. Find the largest number.

#4184. The average of three numbers is 15. Sum of the first two numbers is 25. Find the third number.

Character is who you are when no one is looking.

**Online**

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,964

Hi;

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi bobbym,

The solutions #4183 and #4184 are correct. Good work!

#4185. The average of four consecutive odd numbers is 12. Which is the lowest number?

#4186. The average of five consecutive even numbers is 16. Find their largest number.

Character is who you are when no one is looking.

**Online**

**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,891

Hi ganesh

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,964

Hi;

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi anonimnystefy and bobbym,

anonimnystefy : The solution #4185 is correct. Neat job!

bobbym : Both the solutions are correct. Good work!

#4187. A group of 20 girls has average age of 12 years. Average age of first 12 from the same group is 13 years. What is the average age of the other 8 girls?

#4188. A class has 20 boys and 30 girls. The average age of boys is 12 years and that of girls is 11 years. What is the average age of the whole class?

Character is who you are when no one is looking.

**Online**

**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,891

Hi ganesh

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,964

Hi;

**In mathematics, you don't understand things. You just get used to them.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi anonimnystefy and bobbym,

The solutions #4187 and #4188 are correct. Marvelous!

#4189. The average age of a class of 39 students is 15 years. If the age of the teacher is included, then the average increases by 3 months. Find the age of the teacher.

#4190. A man goes to a certain place at a speed of 30 km/hour and returns to the original place at a speed of 20 km/hour. Find the average speed of the whole journey.

Character is who you are when no one is looking.

**Online**

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,964

Hi ganesh;

**In mathematics, you don't understand things. You just get used to them.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi bobbym,

The solutions #4189 and #4190 are correct. Good work!

#4191. If the sum of one-half and one-fifth of a number exceeds one third of that number by 7 1/3. Find the number.

#4192. A fraction becomes 2/3 when 1 is added to both, its numerator and denominator. Also it becomes 1/2 when 1 is subtracted from both the numerator and denominator. Find the fraction.

Character is who you are when no one is looking.

**Online**

**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,891

Hi ganesh

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,964

Hi;

**In mathematics, you don't understand things. You just get used to them.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi anonimnystefy and bobbym,

The solution is

The solution #4192 is correct, anonimnystefy! Good work!

Both the solutions #4191 and #4192 are correct, bobbym! Neat job!

#4193. Find the value of

.#4194. Find the value of

.Character is who you are when no one is looking.

**Online**

**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,891

Hi ganesh

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,964

Hi;

**In mathematics, you don't understand things. You just get used to them.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi anonimnystefy and bobbym,

The solutions #4193 and #4194 are correct. Neat job!

#4195. Find the value of

.#4196. Find the value of

.Character is who you are when no one is looking.

**Online**

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,964

Hi;

**In mathematics, you don't understand things. You just get used to them.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi bobbym,

The solutions #4195 and #4196 are correct. Brilliant!

#4197.

= ?#4198. Find the value of x if

Character is who you are when no one is looking.

**Online**

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,964

Hi;

**In mathematics, you don't understand things. You just get used to them.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi bobbym,

The solutions #4197 and #4198 are correct. Brilliant!

#4199. Find the value of n if

.#4200. Find the value of x if

.Character is who you are when no one is looking.

**Online**

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 92,964

Hi;

**In mathematics, you don't understand things. You just get used to them.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 16,085

Hi bobbym,

The solutions #4199 and #4200 are correct. Stupendous!

#4201.

#4202.

Character is who you are when no one is looking.

**Online**