how to solve series problems quickly By Tricks

how to solve series problems quickly By Tricks

Generally, two kinds of series are asked in the examination.  One is based on numbers and the other based on alphabets.

Step 1: Observer are there any familier numbers in the given series. Familier numbers are primes numbers, perfect squares, cubes … which are easy to identify.

Step 2: Calculate the differences between the numbers.  Observe the pattern in the differences.  If the differences are growing rapidly it might be a square series, cube series, or multiplicative series.  If the numbers are growing slowly it is an addition or substration series.

If the differences are not having any pattern then
1.  It might be a double or triple series.  Here every alternate number or every 3rd number form a series
2.  It might be a sum or average series.  Here sum of two consecutive numbers gives 3rd number.  or average of first two numbers give next number

Step 3: Sometimes number will be multiplied and will be added another number So we need to check those patterns

1. 3, 4, 7, 11, 18, 29,?

(1) 31

(2) 39

(3) 43

(4) 47

2. AGMSY, CIOUA, EKQWC, ? , IOUAG, KQWCI

(1) GMSYE

(2) FMSYE

(3) GNSYD

(4) FMYES

3. 975, 864, 753, 642,?

(1) 431

(2) 314

(3) 531

(4) 532

4. 8, 24, 12, ?, 18, 54

(1) 28

(2) 36

(3) 46

(4) 38

5. 17 : 60 : : 20 : ?

(1) 57

(2) 69

(3) 81

(4) 93

6. 6 : 64 : : 11 : ?

(1) 144

(2) 169

(3) 121

(4) 124

7. 123 : 4 : : 726 ?

 (1) 23

(2) 26

(3) 14

(4) 12

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