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: 30,636

Hi,

#4265. A bus moving at 40 kilometers per hour covers a distance of 6 hours 15 minutes. If it travels the same distance at 50 kilometers per hour, then how long will it take to cover the distance?

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: 2,000

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.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

The solution #4625 is correct. Neat work, Monox D. I-Fly!

#4626. Evaluate:

(Rounded off to the nearest whole number).

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: 30,636

Hi,

#4627. 'A' can do a piece of work in 12 days. 'A' and 'B' together can can complete the same piece of work in 8 days. In how many days can 'B' alone complete the same piece of work?

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: 30,636

Hi,

#4628. In a 500 meter race, B starts 45 meters ahead, but A wins the race while B is still 35 meters behind. What is the ratio of the speeds of A and B assuming both start at the same time?

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

#4629. Two numbers are in the ratio 3 : 4. The product of their Greatest Common Divisor (GCD, also known as HCF, Highest Common Factor) and Least Common Multiple (LCM) is 2028. Find the sum of the numbers.

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

.

#4630. How many numbers consisting of 5 digits can be formed in which the digits 3, 4, and 7 are used only once and the digit 5 is used twice?

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

.

#4631. The printed price of an article is 40% higher than its cost price. Then, find the rate of discount so that he gains 12% profit.

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

.

#4632. Find the value of

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

.

#4633. Solve:

.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: 2,000

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.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

.

The solution #4633 is correct. Good work, Monox D. I-Fly!

#4634. Solve:

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: 2,000

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.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

The solution #4634 is correct. Keep it up, Monox D. I-Fly!

#4635. A man rows 40 kilometers upstream in 8 hours and a distance of 36 kilometers downstream is 6 hours. Then, find the speed of the stream.

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

#4636. A father is nine times as old as his son and the mother is eight times as old as the son. The sum of the father's and the mother's age is 51 years. What is the age of the son?

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: 2,000

May his adventurous soul rest in peace at heaven.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

#4637. A drainage tile is a cylindrical shell 21 centimeters long. The inside and outside diameters are 4.5 centimeters and 5.1 centimeters respectively. What is the volume of the clay required for the tile? (in terms of pi)

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

#4638. Evaluate:

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

#4639. Evaluate:

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

.

#4640. Find the value of y: (take positive square roots only)

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: 2,000

May his adventurous soul rest in peace at heaven.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

Good attempt, Monox D. I-Fly!

#4641. Find the value of m.

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

#4642. Find the value of w.

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

.

#4643. A train crosses a platform in 30 seconds traveling with a speed of 60 kilometers per hour. If the length of the train be 200 meters, then find the length of the platform.

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

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 30,636

Hi,

#4644. A sum amounts to $480 in 4 years at simple interest. What will it amount to of the rate of interest is increased by 2%?

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

Offline