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: 29,227

Hi,

#7661. The average salary of A, B, and C is $35000 per annum. Also, the average salary of D and E is $38000 per annum. What is the average salary per annum of all the five taken together?

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: 1,936

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: 29,227

Hi,

.

Neat work!

#7662. The average age of 8 persons is increased by 2 years when one of them, whose age is 24 years is replaced by a new person. Find the age of the new person.

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: 29,227

Hi,

#7663. The average of coins with a group of friends reduces by 1, when one friend having 20 coins leaves the group. Find the number of friends left in the group given that originally, average of coins was 15.

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: 29,227

Hi,

#7664. Find the average of squares of natural numbers up to 6.

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

Offline