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#6651 2020-07-11 00:49:07
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4795. a, b, c, d, e, f, and g are consecutive even numbers; j, k, l, m, and n are consecutive odd numbers. Find the average of all the numbers.
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.
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#6652 2020-07-13 00:24:52
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4796. When a student weighing 45 kilograms left a class, the average weight of the remaining 59 students increased by 200 grams. What is the average weight (in kilograms) of the remaining 59 students?
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.
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#6653 2020-07-15 00:42:24
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4797. The average age of a family of 5 members is 20 years. If the age of the youngest member is 10 years, what is the average age of the family at the time of the birth of the youngest member?
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.
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#6654 2020-07-17 00:29:19
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4798. Find the average of the first five multiples of 6.
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.
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#6655 2020-07-19 00:25:35
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 48,395
Re: Oral puzzles
Hi,
#4799. The average of 50 numbers is 38. If two numbers, namely, 45 and 55 are discarded, find the average of the remaining numbers.
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.
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#6656 2020-07-21 00:42:59
- Jai Ganesh
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- Posts: 48,395
Re: Oral puzzles
Hi,
#4800. The average of 11 results is 50. If the average of the first six numbers is 49, and that of the last six is 52, then find the sixth number.
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.
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#6657 2020-07-23 00:37:43
- Jai Ganesh
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- Posts: 48,395
Re: Oral puzzles
Hi,
#4801. The average of six consecutive even numbers is 25. Find the difference between the largest and the smallest number.
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.
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#6658 2020-07-25 00:42:19
- Jai Ganesh
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- Posts: 48,395
Re: Oral puzzles
Hi,
#4802. The average of first three numbers is double of the fourth number. If the average of all the four numbers is 12, find the 4th number.
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.
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#6659 2020-07-27 00:49:30
- Jai Ganesh
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- Posts: 48,395
Re: Oral puzzles
Hi,
#4803. The average of five consecutive positive integers is n. If the next two integers are also added, then find the average of all the integers.
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.
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#6660 2020-07-29 00:39:34
- Jai Ganesh
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- Posts: 48,395
Re: Oral puzzles
Hi,
#4804. If the salary of A is 50% more than the salary of B and 20% less than the salary of C, the salary of C is what percentage more than the salary 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.
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#6661 2020-07-31 00:30:51
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4805. In a school, 30% of a class consists of girls and there are 21 boys in the class. How many girls are there in the class?
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.
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#6662 2020-08-02 00:05:44
- Jai Ganesh
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- Posts: 48,395
Re: Oral puzzles
Hi,
#4806. What is 10% of 20% of 30% of 40?
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.
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#6663 2020-08-04 00:33:34
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4807. A student multiplied a number by 3/4 instead of 4/3. What is the percentage error in the calculation?
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.
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#6664 2020-08-06 00:23:41
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4808. Which of the following is the largest number?
a) 10% of 100
b) 5% of 300
c) 100% of 5
d) 500% of 5.
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.
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#6665 2020-08-08 00:31:26
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4809. If 10% of a number is 70, then what is 25% of that number?
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.
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#6666 2020-08-10 00:15:35
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4810. What is 10% of 20% of 25% of 200?
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.
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#6667 2020-08-12 00:43:55
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4811. A number when reduced by 10% gives 30.Find the number.
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.
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#6668 2020-08-14 00:38:30
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4812. If 60% of x = 20% of y, find the value of x if y = 20.
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.
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#6669 2020-08-16 00:26:06
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4813. 50% of x% of y is equal to 75% of y% of z. What is the value of z?
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.
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#6670 2020-08-18 00:21:13
- Jai Ganesh
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Re: Oral puzzles
Hi,
#4814. A number increased by 22.5% gives 98. Find the number.
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.
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#6671 2020-08-20 00:53:49
- Jai Ganesh
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- Posts: 48,395
Re: Oral puzzles
Hi,
#4815. 20% of a number subtracted from 120, gives the number itself. Find the number.
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.
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#6672 2020-08-22 00:28:15
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 48,395
Re: Oral puzzles
Hi,
#4816. If A exceeds B by 60%, and B is less than C by 20%, find the ratio A:C.
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.
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#6673 2020-08-24 00:14:16
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 48,395
Re: Oral puzzles
Hi,
#4817. If 120 is 20% of a number, then what is 120% of that number?
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.
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#6674 2020-08-26 00:27:19
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 48,395
Re: Oral puzzles
Hi,
#4818. A fruit seller had some apples. He sells 40% apples and has 480 apples. Originally, how many did he had?
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.
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#6675 2020-08-28 00:24:37
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 48,395
Re: Oral puzzles
Hi,
#4819. What percentage of numbers from 1 to 60 have 1 or 9 in the unit's digit?
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.
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