First we are supposed to reduce the fractions if possible.
The fraction part of 3 + 20/24 is reducible, all others irreducible. Reduce them by 4 .
ry2 shows how to find LCM (Least Common Multiple) of 48 and 60 which will also be true for 24.
Just place the numbers into their correct places .
We want you to get acquainted with the matrices via this simple operation .
This is the first step of question 19 of "http://www.test-dr.com/education/5th-Grade-Mathematics/addition-of-fractions-5.1.1.html" .
Neglect the upper half and divide the result you obtained by 2 .
Equivalent fractions are reduced/expanded forms of each other .
1680 = 2x840.
Is 1680 = 700 + 700 + 280 divisible by 7 ?
How to find GCD of 7 and 1680 is shown in ry1.
LCM is in ry2 .
Take the simplest case of 80 seats. In Theatre 2 and 3 there should be 53 seats. 53/2 = 26 1/2 .
There should be 15 more in T-2 which means 26 1/2 - 7 1/2 = 19 seats in T-3. And of course 34 in T-2 .
Before food he must have $300. Let the price of PSP be P, (1+1/2)xP should be $200
A+36 should be divisible by A. 1 is an integer which means 36/A should be an integer. 36 is divisible by A if A=1, ...
Each element of the numerator is twice the corresponding element in the denominator .
1/2 + 3/20 + 3/28 + 9/110 = (110+33+18)/220 + 3/28 = ...
Have a look at ry1 . Just to get acquainted with set theory .
The simplest group consists of 4 girls each having an age of 13 and 8 boys each being 10 years old. 1/4 of the girls is a girl with most probable age of 13
The inverse of a digit D is 1/D . The question is very simple indeed and you have to see the structure and pinpoint the digits very quickly. This means
gaining precious time.
The first 9 elements are the 9 digits. So for the other 45 numbers there are 90 digits . 10th digit is tens' of 10, i.e. 1. 30th digit is 2 and 50th digit 3.
90th digit is 5.
These type of problems are more easily solved by trial and error. Just try the answers .
Let he amount of mixture be B at the beginning and E at the end. We have to find 2 equations:
1. E = B - 20 .
2. (3/10)xE + 20 = B/2.
Putting 1 in 2 we have (3/10)x(B-20) + 20 = B/2 which means B/2 - 3xB/10 = 14
Learn 3-4-5 triangle, it is important. Have please a look at ry1 for the rest.
The question reduces to 1/12 + 1/20 + 1/30 = ?
The last two are around 1 whereas the first two are around a half .
The first two are 7 and 8 .
5/(A+5) ≥ 1/2 .
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