## SSC-CGL : Daily Problems : Ratio and Proportion : Problem 1

Hey guys! So today’s problem is this :

If 3x = 5y = 4z, then x : y : z is equal to ?

a). 9 : 12 :16                            b). 20 : 12 : 15

c). 15 : 10 : 9                           d). 8 : 5 : 3

Solution :

Okay so now in problems like these, the first thing you do is that you seperate the numbers associated with the variables x,y and z.

So here our numbers are 3, 5 and 4.

Now take an LCM of it. So the LCM of 3, 5 and 4 will be 60.

For your final step, form this equation :

LCM/3 : LCM/5 : LCM/4

60/3 : 60/5 : 60/4

20 :12 : 15

Hence, the answers is (b) PRO TIP :      From the question itself, you can identify that x will be the biggest number, followed by z and then y. So eliminate (a), (c) and (d) and hence (b) is your answer! 😉 Get it ? ## Time and Work : Solved Problems : Part 1

Hello everyone!

So today is the first lecture in the solved problems video series and the problems are on Time and Work.

So I’ve picked up 5 questions from YouTube from my comments and I’ve made a video explaining how to solve each one of them.

I’ve also attached a pdf at the end with detailed solutions for those who’d like some more help.

Learn and Share! The Problems :

The Solution :

## Chain Rule Aptitude Lectures : Part 1

Hello Everyone! This Monday I bring you, Part 1 on the lectures of Chain Rule These lectures revolve around sums like “If 15 men take 4 days to build a way 100 mts high, then how long will 12 men take to build the same wall ?”

Now sums like these are usually solved via direct and indirect proportion.

But I’d like to introduce a new method, called “The Cause Effect Rule”, where a problem is broken down into its essential elements and then tackled If you liked this video, make sure you help me out by liking, subscribing and also sharing this video with your friends! Cheers! 