Riddles: Learn Solving Equations Video Lecture - Class 6

hello friends this video on algebra part
15 is brought to you by exam fear calm
no more fear from exam let's look at
some riddles now so based on the
algebric algebra what we have learned in
this lesson
Who am I for each day of the week make
an up count for me so how many days are
there in a week seven days so every day
you increase me by one up count means
you increase me by one every day if you
make no mistake you will get 23 okay so
you are given a number now we don't know
what is that number so let us say let us
assume that this I or this unknown
number is X so if you are given X and if
you up count X every day in a week that
means on Sunday it is X on Monday it
becomes X plus 1 on Tuesday it becomes X
plus 2 on madness new it becomes X plus
3 so in total seven days it becomes X
plus seven so over a week's time it
becomes X plus seven so if you have made
no mistake that means if you have
increased it by one every day throughout
the week then what will be you get at
the end of the week X plus seven so that
X plus seven is nothing but 23 right so
X plus seven is equal to 23 this is the
algebraic equation that you can form
looking at the question so by
understanding the question you can form
this algebraic equation now can you
solve this equation you will have to
find the value of x so what will be the
value of x let's move the constants to
this side so plus seven will become
minus seven so 23 minus seven is 16
therefore X is equal to 16 so I is
nothing but 16 so now you think of
number 16 and if you keep increasing one
number every day in the week so after
one week it becomes 23 let's look at the
next one
tell me who I am I shall give a pretty Q
you you will get me back if you take me
out of 22 so please read this very
you will get me back if you take me out
of 22 so let us say that let this
unknown number ibx so we will get the
same number back because it says you
will get me back so that means you will
get back eggs if you take out eggs from
22 that means if you subtract X from 22
you will get X because this X is I that
is me so it says you will get me back
that means you will get X if you take X
out of 22 if you take out X out of 22
that is if you subtract X from 22 so now
look this is the algebraic equation that
you form looking at the question can you
solve this equation for x you will have
to find the value of x now what did I
tell you you need to collect all the
variables on one side and all the
constants on the other side so in this
case the constant is 22 and variable is
X so you have One X on one side and the
other X on the other side so let's try
to shift this X to this side
so what happens when this X moves to
this side it becomes plus X so 22 is
equal to 1 X plus 1 X that is 2 X so now
what will happen let's shift this 2 to
this side so this becomes this to was 2
into X so this time it will become 22
divided by 2 is equal to X so 22 by 2 is
equal to X therefore X is equal to this
is 211 sir 22 so X is equal to 11
therefore this unknown number or I is
nothing but 11 so you see these are
beautiful so you can solve a lot of
beautiful riddles using this concept of
algebra so I hope that this basic ideas
on algebra is clear to you you the most
important thing that you should
understand that this level is why have
we studied
tebron why where do we use them also
trying to solve simple equations of
algebra try to form equations of algebra
that is more important like you are
given a statement understand the
statement properly and try to form the
algebraic expression for it and that's
going to help you in understanding so I
hope this lesson would have helped you
see you all in the next lesson thank you
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