Math Is Fun Forum

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

Re: Oral puzzles

---

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

The solution #4286 is correct. Excellent,  Monox D. I-Fly!

#4287. The average weight of 25 students is 16 kilograms. The average weight of the first 12 students is 14 kilograms and the last 12 students is 17 kilograms. Find the weight of the thirteenth student.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

Re: Oral puzzles

---

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

The solution #4287 is correct. Neat work,  Monox D. I-Fly!

#4288. Ronit's age is 10 years more that Rohit's age. Also, Ronit was twice old as Rohit 15 years ago. What will be the age of Ronit 6 years after?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4289. 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 age of the remaining girls.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4290. The height of 5 boys is recorded as 146 centimeters, 154 centimeters, 164 centimeters, 148 centimeters, and 158 centimeters. What is the average height of all these boys?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4291. The average marks in English subject of a class of 24 students is 56. If the marks of three students were misread as 44, 45, and 61 of the actual marks 48, 59, and 67 respectively, then what would be the correct average?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

.

#4292. Find the average of the following set of scores: 253, 124, 255, 534, 836, 375, 101, 443, and 760.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

.

#4293. On Teachers' Day, were to be equally distributed among 540 children. But, on that particular day, 135 children remained absent, henthe, each child got 2 sweets extra. How many sweets was each child originally supposed to get?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4294. At present, A's age is 1.5 times the age of B. Eight years hence, the ratio of the ages of A and B will be 25:18. What is B's present age?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4295. The age of the father is 30 years more than the son's age. Ten years hence, the father's age will become three times the son's age that time. What is the son's present age in years?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4296. 'A', 'B', and 'C' are three consecutive even integers such that four times 'A' is equal to three times 'C'. What is the value of 'B'?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4297. Evaluate:

.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

Re: Oral puzzles

---

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

.

The solution #4297 is correct. Splendid, Monox D. I-Fly!

#4298. Find the value of b. Choose the correct option.

.
(a)

.
(b)

.
(c)

.
(d)

.
(e)

.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

.

#4299. A and B are natural two numbers. 6 times the square of B is 540 more than the square of A. If the respective ratio of A and B is 3:2, what is the value of B?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

.

#4300. Choose the right answer:

.

.

.

.

.

.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4301. Choose the right option:

.

.

.

.

.

.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4302. The respective ratio of the present ages of a mother and daughter is 7:1. Four years ago, the respective ratio of their ages was 19:1. What will be the mother's age four years from now?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

Re: Oral puzzles

---

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.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

.

Good attempt,  Monox D. I-Fly!

#4303. If A:B:C = 2:3:4, then find the ratio

.

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

.

#4304. 729 milliliters of a mixture contains milk and water in the ratio 7:2. How much more water is to be added to be a new mixture containing milk and water in the ratio 7:3?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4305. 'A' began business with $45,000 and was later joined by 'B' with $54,000. When did 'B' join if the profit at the end of the year were divided in the ratio 2:1?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4306. 'A' starts business with $7000 and after 5 months, 'B' joins 'A' as his partner. After a year, the profit is divided in the ratio 2:3. What is 'B' contribution in the capital?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,411

Re: Oral puzzles

Hi,

#4306. 'A' starts business with $7000 and after 5 months, 'B' joins 'A' as his partner. After a year, the profit is divided in the ratio 2:3. What is 'B' contribution in the capital?

---

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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