# Important Shortcuts and Mind Tricks for Number Series Questions in Aptitude Section – Download in PDF

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Important Shortcuts and Mind Tricks for Number Series Questions in Aptitude Section – Download in PDF:
Dear Readers, Aptitude Shortcut methods and tricks for Number Series Questions were given below. Candidates those who are preparing for Bank PO/Clerk and all other competitive Exams can also download this in PDF.

Important Points to remember:

i). If numbers are in ascending order in the number series.
Numbers may be added or multiplied by certain numbers from the first number.
SET – I:
Step 1 : Check whether it is ascending , descending or mixed order. Step 2 : It is  in ascending order. So add or multiply by certain numbers from the first number.
Step 3 : The difference between first number and second, and difference between second and third and so on., are in increasing order of +4 and +3
Step 4: Hence the answer for above series is 37.
Step 1: Check whether it is ascending , descending or mixed order.
Step 2: It is  in ascending order. So add or multiply by certain numbers from the first number.
Step 3: By adding  first number and second, and  second and third and so on., it is not in the sequence of increasing order. Try multiplication
Step 4: Take 1 and 3, let’s start multiplying 1*3=3, by seeing this we get to know, by multiplying 3*4 it gives 12, and 12*5=60.
Step 4: Hence the answer for above series is 360.
ii). If numbers are in descending order in the number series,
Numbers may be subtracted or divided by certain numbers from the first number.
SET – II :
Step 1 : Find whether the given number is in descendingorder.
Step 2: It is in descending order . So subtract or divide by certain numbers  from the first number.
Step 3: The difference between first number and second, and difference between second and third and so on, are in order of -16,-8,-4,-2
Step 4: Hence the answer for above series is 3.
Step 1: Check whether it is ascending , descending or mixed order.
Step 2: It is  in descending order. So subtract or divide by certain numbers from the first number.
Step 3: By dividing  first number by 6 it gives 120.
Divide 120/ 5 =24, 24/4=6, 6/3=2, 2/2=1 .It is in decreasing order.
Step 4: Hence the answer for above series is 1.
iii). If numbers are in mixing order (increasing and decreasing) in the number series.
Numbers may be in addition, subtraction, multiplication and division in the alternate numbers.
Step 1: Check whether it is ascending , descending or mixed order.
Step 2: It is  in mixing order. So it may be in addition, subtraction, division and multiplication, squares and cubes.
Step 3: In above series it is mixing of square, addition and subtraction.
(14)2= 196+4= 200
(13)2=169. By adding 4 it gives 173. Try subtraction.
169-4=165
Here we found it is in order of squaring a number, adding by 4 and subtracting by 4.
Step 4: Hence the answer for above series is 77.
Step 1: Check whether it is ascending , descending or mixed order.
Step 2: It is  in ascending  order. So add or multiply by certain numbers from the first number.
Step 3: In above series lets add first number with 3 i.e.,14+3= 17
But with second number we can’t able to add +3 and so on.
Let’s try adding first number and second number i.e. 14+17=31
Second and third, i.e. 17+31 =48 and so on
This series is in the form of miscellaneous
Step 4: Hence the answer for above series is 79

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