Ratio and Proportion : Problems, Formulas, and Shortcuts

18 Responses

1. v says:

Hi, I can’t really understand the last part. Though if the readers are willing to know another solution which is not really a kinda shortcut but wants to know the answer, here is how I got the final answer for shortcut 3.

1st part:
Given ratio: 2:3
Total Quantity: 10 litres

sol’n:
2+3=5 (use the sum to divide the total)
10÷5=2 (use the quotient to multiple to each ratios)

2×2:2×3 = 4:6 (this is the exact ratio)

Part 2:
Ratio to be solved: 1:3

“What amount of water should be added?” (This a word prob equation key words)

4:6 from first part (oil:water) and equate to the given ratio

4/6+x =1/3 (cross multiply)

4×3 =6+x
12=6+x
12-6=x
x=6 (now substitute it to x)

4/6+x
4/6+(6)
If you simplified further, it will be 1/3

here ya go.

Kaway Kaway sa kukuha sa admu, dlsu, ust saka up!

-v

2. Rashi says:

3. meena says:

shortcut 3 is not understand
i dont know how you defined.

4. jyothi says:

3:27::6:216
explanation: 3^3=27 & 6^3=216 so answer is 216
or
3*9=27 & 6*9=54 based on the options select answer

5. Menomeno says:

6. kartik singh says:

its really so easy and short ….so thaku so muchhhhhhh

7. Anju says:

If a:b:c 2:3:5 and a-6cm then find b and c

8. niharika says:

if we are given with a:b:c then what would be the formula? bc:ca:ab or ab:bc:ca???

9. Dimpi says:

It helped me a lot… thanks

10. kashmeera srivastava says:

hello sir,
I am preparing for bank po exams currently..I am actually finding profit loss and discounts a difficult stuff for me..Could you just provide me with some tricks and the easier ways to deal with these chapters?

11. ravi says:

It’s nice.. Sir We r expecting more.

12. saranya says:

What is the value of a in shortcut 3 .. I can’t get it clearly.. Could y explain

13. Jenny Teutao says:

hope to have this website my tutoring solution

14. Manisha Khandare says:

15. Naresh says:

3:27::6:? Plz send me the formula with explain this query.

16. karuna says:

super

17. saraswathi says:

hi, thank u and super

18. sandhya says:

very easy and great method thank you very much dushyanth ji

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