Important
TRICKS:
1. Total number = Rank from TOP + Rank from BOTTOM -1.
2. Total number = Rank from LEFT + Rank from RIGHT -1.
3. For Interchange of
position: FOCUS on that position for which rank is given from both the end and
then use the concept above ( 1 or 2) Trick.
4. Position of 1st
is given from 1st end and position of 2nd is given from 2nd
end given, then Answer will be : either
Total = L+R+n or
Total = L+R-n-2
Note: when both are available
in answer, then choose: answer cannot be determined.
SOLVED EXAMPLE:
Model1: To find the total number of
person in the row, when position of person if given from any one end.
Q1. Babul rank 9th
from TOP and 38th from bottom in a class. What is the total number
of students?
Ans: Total number = Rank from TOP + Rank from BOTTOM -1.
Total number = 9 +38 -1 = 46
Model2: To find out the position of a
person in the row from Left side or Right side:
Q2. There are 12 Person in a row. The position of Ram is 7th from
Left. What is his position from the right end?
Ans:
Total number = Rank from Left + Rank from Right -1.
12 = 7 + Rank from Right -1
Rank from Right= 12+1-7
= 6
Q3.
In a class of 36 students, if Ashish ranks
from the TOP is 12 and Vaibhav ranks 3 place above him. What is Vaibhav rank
from Top?
Ans: Vaibhav rank from TOP = (12-3) = 9
Vaibhav rank from BOTTOM = X (let)
Total
number = Rank from TOP + Rank from BOTTOM -1.
Rank from BOTTOM= Total number - Rank from
TOP + 1.
= 36 -9 +1 =
37-9 = 28
Rank from BOTTOM = 28
Model3: For Interchange of position
TRICK: FOCUS on that position for which rank is
given from both the end
Q4.
In a row of girls, Dipa is 7th from
Left and Madhu is 12th from right. If they interchange their
position, Dipa becomes 22nd from Left , what is the total number of
girls in the row?
Ans: FOCUS on position of Dipa
After interchange Dipa becomes 22nd
from Left.( This position is same as earlier position of Madhu .ie. Madhu is 12th
from right)
Hence, for Dipa:
Position from Left = 22 (after
interchange)
Position from right = 12 (Madhu’s
original position)
Now,
Total
number = Rank from Left + Rank from Right -1.
= 22+12-1 = 33.
Model4: Position of 1st is given from 1st
end and position of 2nd is given from 2nd end:
Q5.
Prakash
is 14th from left end and Qureshi is 7th from right end
in a row of boys. What is the total number of boys in the row, if there
are 4 boys between them.
Ans: either Total = L+R+n or
Total = L+R-n-2
Total = L+R+n = 14+7+4
= 25
Or, Total = L+R-n-2 = 14+7-4-2 = 15
Hence, Answer is 25 or 15 [choose that
option which given in question. If both are there in option then, choose:
cannot be determined option.]
Model5: Finding option by elimination of Wrong
option:
Q6.Ritesh is taller than Anup but shorter
than Seema. Kapil is taller than Pooja but shorter than Anup.Deepak is taller
than kapil but shorter than Seema.Who among them is tallest?
Ans: Traditional Method: Time consuming
S>R>A>k>P and D>K and
D< S, hence K<D<S: Seema is
tallest
Shortcut
Method: Eliminate the wrong option
( here, eliminate the 5 persons who
cannot be tallest.)
Ritesh is taller than Anup ( Anup X)
Ritesh
is shorter than Seema(Ritesh X).
Kapil is taller than Pooja (Pooja X)
Kapil is shorter than Anup.(kapil X)
Deepak is taller than kapil . .(kapil X)
Deepak is shorter than Seema.( Deepak X)
Hence, Seema is tallest ( as all other options are
now eliminated).
Model6: Ordering: Statement and meaning :
a) A is neither taller nor equal to B : A< B
b) A is neither shorter nor equal to B: A> B
c) A is neither shorter nor taller than B: A =B
d) A is not taller than B: A< =B
e) A is not shorter than B: A> =B
f) A is as tall as B : A<B
g) A is not as tall as B: A<B
h) A is only shorter than B : A< B
Model7: Statement containing”ONLY” and its meaning:
a) A is shorter than B: A<B
b) A is shorter than ONLY B: A<B and it also mean B is tallest and A is 2nd tallest in group
c) A is taller than B: A>B
d) A is taller than ONLY B: A>B and it also mean, B is shortest and A is 2nd shortest in group.
No comments:
Post a Comment