Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

You are not logged in.

## #6651 2020-07-11 00:49:07

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6652 2020-07-13 00:24:52

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6653 2020-07-15 00:42:24

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6654 2020-07-17 00:29:19

ganesh
Registered: 2005-06-28
Posts: 30,893

### Re: Oral puzzles

Hi,

#4798. Find the average of the first five multiples of 6.

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

## #6655 2020-07-19 00:25:35

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6656 2020-07-21 00:42:59

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6657 2020-07-23 00:37:43

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6658 2020-07-25 00:42:19

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6659 2020-07-27 00:49:30

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6660 2020-07-29 00:39:34

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6661 2020-07-31 00:30:51

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6662 2020-08-02 00:05:44

ganesh
Registered: 2005-06-28
Posts: 30,893

### Re: Oral puzzles

Hi,

#4806. What is 10% of 20% of 30% of 40?

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

## #6663 2020-08-04 00:33:34

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6664 2020-08-06 00:23:41

ganesh
Registered: 2005-06-28
Posts: 30,893

### 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 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

## #6665 2020-08-08 00:31:26

ganesh
Registered: 2005-06-28
Posts: 30,893

### Re: Oral puzzles

Hi,

#4809. If 10% of a number is 70, then what is 25% of that 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

## #6666 2020-08-10 00:15:35

ganesh
Registered: 2005-06-28
Posts: 30,893

### Re: Oral puzzles

Hi,

#4810. What is 10% of 20% of 25% of 200?

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

## #6667 2020-08-12 00:43:55

ganesh
Registered: 2005-06-28
Posts: 30,893

### Re: Oral puzzles

Hi,

#4811. A number when reduced by 10% gives 30.Find the 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

## #6668 Yesterday 00:38:30

ganesh
Registered: 2005-06-28
Posts: 30,893

### Re: Oral puzzles

Hi,

#4812. If 60% of x = 20% of y, find the value of x if y = 20.

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