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

You are not logged in.

#3 Re: Exercises » Geometry » 2018-08-07 00:28:26

Options are
A) 30:60
B) 45:45
C) 30:30
D) none
Show with graph

#4 Re: Exercises » Increase and decrease in quantity » 2018-08-06 03:20:32

Not this difference , Means the difference between methods and when to use

#5 Exercises » Geometry » 2018-08-05 22:21:29

Zeeshan 01
Replies: 8

Q:   In a right-angle triangle, perpendicular is 3 times the base. What is ratio
of their opposite angles?

#7 Exercises » Increase and decrease in quantity » 2018-08-05 15:27:48

Zeeshan 01
Replies: 5

If 450 is first increased by 10% and then decreased by 15%  , Then the resulting number is?

#8 Exercises » Questions » 2018-07-29 18:16:20

Zeeshan 01
Replies: 0

Question : 1  It takes John 30 minutes to mark a paper, Bob only takes 25 minutes to mark a paper, if
they both start marking a paper at 11:00 AM, what is the first time they will finish marking
a paper at same time?

Question 2: Of two kinds of alloy , silver and copper are contained in one in the ratio of 5:1 and in the other in the ratio of 7:2 . What weights of the two alloys should be melted and mixed together so as to make up a 5 lb mass with 80% of silver?

Question 3  :An alloy contains copper and zinc in the ratio of 5:3 and another alloy contains copper and tin in the ratio 8:5 . If equal weights of both alloys are melted together find the weight of tin in the resulting alloy per kg?

Question 4 : The average daily temperature from 9th January to 16th January (both inclusive) was 38.6 degree and that from the 10th to 17th January (inclusive) was 39.2 degree . What was the temperature on 17th January?

#10 Re: Exercises » Questions » 2018-07-27 22:04:06

1. Let m be the number.
After 20% deduction, the number becomes (4/5)m.
30% of Remainder = (3/10)x(4/5)m = (12/50)m = (6/25)m.
Remaining = (19/25)m.
(19/25)m=3500.
m =  4605 approximately.
Therefore, original sum is 4605 approximately.

But My ans Is

after 20% deduction number become 80m\100 , then 30 % deduction from 80m\100 number become 50m\100
So 50m\100 =3500 so m = 7000

#11 Re: Exercises » Questions » 2018-07-27 05:05:36

How original price is ,120\100 *120 ?

#14 Re: Exercises » Questions » 2018-07-27 00:53:08

Yes after 20% deduction number become 80m\100 , then 30 % deduction from 80m\100 number become 50m\100
So 50m\100 =3500 so m = 7000

#15 Exercises » Questions » 2018-07-26 19:28:18

Zeeshan 01
Replies: 10

Question 1 : After deduction 20% from a certain sum , and then 30% from remainder , there is 3500 left . Find the original sum ?

Question 2 : A coat on sale for $120 after a discount of 20 percent. The original price of coat is ?

Question 3 :Method Of Taking L.C.M Of decimal numbers ?

#16 Re: Help Me ! » Questions » 2018-07-17 15:17:09

9*15=135 days  divide 700 by 135  so ,   700/135   =5.18  (Ignore decimal) so answer is 5 years.

#17 Re: Help Me ! » Questions » 2018-07-17 00:08:47

Interesting questions and how about this question

On a certain planet if each year has 9 month and each month has 15 days, how many full years have passed after 700 days on this planet

#19 Exercises » Mathematical Induction » 2018-07-15 19:23:14

Zeeshan 01
Replies: 3

Question: For each natural number n,
               1+3+5+.......+(2n-1)=?
Why is n term is not 2n-1 ??.

#20 Exercises » Quadratic » 2018-07-14 19:44:20

Zeeshan 01
Replies: 1

Question:  If (3x^2)-2x+4=0  , Then Find α^19  , beta^-3

#22 Re: Help Me ! » Division » 2018-07-04 16:42:48

Do that division, given in https://www.mathsisfun.com/long_division.html

#23 Re: Help Me ! » Division » 2018-07-03 05:39:34

zetafunc wrote:

Hi Zeeshan,

I've moved your thread to the Help Me ! forum.

This is not a huge topic , only review of concept of putting zero when divide by larger number such as 3/42 etc .This little thing is not  given in mif

#24 Re: Help Me ! » Division » 2018-07-02 03:21:34

By using long division..

Board footer

Powered by FluxBB