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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

The solution #7546 is correct. Neat work, Monox D. I-Fly!

#7547. The average of five consecutive odd numbers is 7. What is the middle number if they are arranged in descending order?

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.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

#7548. The average of four consecutive odd numbers is 12. Which is the lowest odd 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.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

#7549. If the weights of A, B, and C are 55 kilograms, 60 kilograms, and 62 kilograms, find the average weight.

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.

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**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.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

.

The solution #7549 is correct. Good work!

#7550. Of three numbers, the average of the first and the second is greater than the average of the second and the third. What is the difference between the first and the third of the three numbers?

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

.

#7551. The average of five numbers is 306.4. The average of the first first two numbers is 431 and the average of the last two numbers is 214.5. What is the third number?

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

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**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.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

The solution #7551 is correct. Neat work!

#7552. The average age of a man and his son is 48 years. The ratio of their ages is 11 : 5 respectively. What will be the ratio of their ages after 6 years?

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

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**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.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

The solution #7552 is correct. Neat work!

#7553. The average age of 80 girls was 20 years, the average age of 20 of them was 22 years and that of another 20 was 24 years. Find the average age of the remaining girls.

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

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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 2,000

May his adventurous soul rest in peace at heaven.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

Good attempt!

#7554. In a family, the average age of father and mother is 38 years whereas the average age of father, mother, and their only daughter is 28 years. Find the age of the daughter.

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

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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 2,000

May his adventurous soul rest in peace at heaven.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

The solution #7554 is correct! Neat work!

#7555. The average age of 30 boys in a class is 15 years. One boy aged 20 years left the class, but two new boys came in his place whose ages differ by 5 years. If the average age of all the boys now in the class still remains 15 years, find the age of the younger newcomer.

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

#7556. In a class, there are 40 boys and their average age is 16 years. One boy, aged 17 years, leaving the class and another joining, the average age becomes 15.875 years. Find the age of the new boy.

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

#7557. The average number of toffees with 6 friends is 10. If each of them eats one toffee, then find the average number of toffees with them, now.

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

#7558. The salary of five members of a family is $10,000, $12,000, $17,000, $15,000, and $14,000. Find the average salary of all the members of the family using assumed mean.

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

#7559. Out of seven given numbers, the average of the first four numbers is 4 and that of the last four numbers is also 4. If the average of all the seven numbers is 3, find the fourth number.

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

#7660. The average age of a man and his son is 35 years. The ratio of their ages is 5 : 2 respectively. What is the son's age?

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

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?

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

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**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 2,000

May his adventurous soul rest in peace at heaven.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

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.

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

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.

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

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

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.

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 29,584

Hi,

#7665. Find the average of cubes of natural numbers up to 12.

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

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