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****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

.

#4645. A man sold his watch at a loss of 5%. Had he sold it for $56.25 more, he would have gained 10%. What is the cost price of the watch in $?

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.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

#4646. Three years ago, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today. Find the present age of the baby.

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.

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,876

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

**Online**

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

Good attempt, Monox D. I-Fly!

#4647. The perimeters of two similar triangles are 30 centimeters and 20 centimeters respectively. If one side of the first triangle in is 9 centimeters, determine the corresponding side of the second triangle.

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.

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,876

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

**Online**

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

The solution #4647 is correct. Good work, Monox D. I-Fly!

#4648. In a farm, there are cows and hens. If heads are counted, there are 180, and if legs are counted, there are 420. Find the number of cows in the farm.

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

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,876

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

**Online**

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

The solution #4648 is correct. Neat work, Monox D. I-Fly!

#4649. Average age of 6 sons of a family is 8 years. Average age of son together with their parents is 22 years. If father is older than the mother by 8 years, find the age of mother.

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

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,876

**Online**

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

The solution #4649 is correct. Excellent, Monox D. I-Fly!

#4650. The Least Common Multiple of two numbers is 12 times their Greatest Common Divisor. The sum of the GCD and LCM is 403. If one of the numbers is 93, then find the other.

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

#4651. Find the x-intercept of the graph 7x - 3y = 2.

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

#4652. A person buys some pencils at 5 for $1 and sells them at 3 for $1. Find his gain percent.

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

.

#4653. Find the value of m.

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

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,876

**Online**

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

The solution #4653 is correct. Excellent, Monox D. I-Fly!

#4654. How many seconds will a 500 meter long train take to cross a man walking with a speed of 3 kilometers per hour in the direction of the moving train, if the speed of the train is 63 kilometers per hour?

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

#4655. A number when divided by 361 gives a remainder 47. If the same number is divided by 19, then find the remainder obtained.

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

.

#4656. Evaluate:

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

.

#4657. Find the value of m.

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

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,876

**Online**

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

The solution #4657 is correct, Excellent, Monox D. I-Fly!

#4658. A 260 meter long train crosses a platform thrice its length in 80 seconds. What is the speed of the train in kilometers per hour?

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

#4659. If 50% of x = 30% of y, find x : y.

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

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,876

**Online**

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi,

The solution #4659 is correct. Neat work, Monox D. I-Fly!

#4660. A boatman goes 2 kilometers against the current of the stream in 1 hour and goes 1 kilometer along the current in 10 minutes. How long will it take to go 5 kilometers in stationary water?

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

Offline

**math9maniac****Member**- From: Tema
- Registered: 2015-03-30
- Posts: 429

This is an interesting which answer I await fervently. I attempted but couldn't solve. I can't wait to know the principle involved.

Only a friend tells you your face is dirty.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,086

Hi math9maniac,

.

#4661. Find the area of a parallelogram whose length is 30 cm, width is 20 cm, and one diagonal is 40 cm.

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

Offline