Numerical Sequences Analysis.
This page is all about improving our knowledge in Numerical Skills. Numerical Skills are very important for us in our day today needs. And even to find a job you will definitely need knowledge in Numerical Analysis since you will definitely get a question paper on the above mentioned area. So I'll make sure to fill this page with lot of useful Number patterns and also the solution (the way of getting the answer.) in a more simple and understandable way. If you are new to Number Sequence Analysis at the beginning you will feel very confused but after working on some questions you will definitely get a good idea about how to think and getting answer soon. So Lets begin with some easy simple questions and gradually lets move to more complex Number sequences. Good Luck!
Questions.
Find the missing number in the bellow number sequences.
01. 2,4,6,8,_
02. 3,6,9,12,_
03. 4,8,12,16,_
04. 5,10,15,20,_
05. 6,12,18,24,_
Answers.
01. 10 - Sequence begins with 2 and increase by 2.(0+2=2, 2+2=4, 4+2=6 etc)
02. 15 - Sequence begins with 3 and increase by 3.(0+3=3, 3+3=6, 6+3=9 etc)
03. 20 - Sequence begins with 4 and increase by 4.(0+4=4, 4+4=8, 8+4=12 etc)
04. 25 - Sequence begins with 5 and increase by 5.(0+5=5, 5+5=10, 10+5=15 etc)
05. 30 - Sequence begins with 6 and increase by 6.(0+6=6, 6+6=12, 12+6=18 etc)
Questions.
06. 2,3,5,7,9,_
07. 2,3,5,7,11,_
08. 4,9,16,25,36,_
09. 2,3,5,8,13,21,_
10. 54,49,44,39,_
Answers.
06. 11 - This is an Odd number sequence.
07. 13 - This is a prime number (prime number -A Number greater than 1 that has no positive divisors other than 1 and itself ) sequence.
08. 49 - (2*2=4, 3*3=9, 4*4= 16 ... 7*7=49)
09. 34 - Sequence begins with 2. Number calculated by adding previous two numbers.(2+3=5, 3+5=8, 5+8=13 ... 13+21=34)
10. 34 - Number calculated by adding -5 to every number in the sequence. (54+(5)=49, 49+(5)=44, 44+(5)=39, 39+(5)=34)
Questions.
11. 4,8,16,32,_
12.3,8,15,24,_
13.1,2,4,7,11,16,_
14.70,60,62,56,52,_
15.100,50,25,12.5,_
Answers.
11. 64 -The number calculated by multiplying the previous number by 2.(4*2=8, 8*2=16, 16*2=32, 32*2=64)
12. 35- (2*2-1=3, 3*3-1=8, 4*4-1=15, 5*5-1=24, 6*6-1=35)
13. 22 - Difference on the above numbers are 1,2,3,4,5,6. So 1+1=2, 2+2=4, 4+3=7 ... 16+6=22
14. 50 (70-10=60, 60-8=62, 62-6=56, 56-4=52, 52-2=50)
15. 6.25 - Sequence maintained by dividing the previous number by 2. (100/2=50, 50/2=25, 25/2=12.5, 12.5/2=6.25)
Questions.
16. 3,7,13,21,31,_
17. 13,25,41,61,85,_
18. 144,169,196,225,_
19. 5,10,17,26,_
20. 2,8,4,16,6,32,8,64,_
Answers.
16. 43 - (2*2-1=3, 3*3-2=7, 4*4-3=13, 5*5-4=21, 6*6-5=31) or difference increase by 2 every time.(4,6,8,10,12)
17. 113 - (2*2+3*3=13, 3*3+4*4=25, 4*4+5*5=41, 5*5+6*6=61, 6*6+7*7=85, 7*7+8*8=113)
18. 256 - (12*12=144, 13*13=169, 14*14=196, 15*15=225, 16*16=256)
19. 37 - (2*3-1=5, 3*4-2=10, 4*5-3=17, 5*6-4=26, 6*7-5=37) or difference increasing by 2 every time.(5,7,9,11)
20. 10 - First number increase by 2 and skipping one number position and so on.
Questions.
21. 48,46,44,42,_
22. 3,9,4,5,25,20,_
23. 001,010,011,100,101,_
24. 88, 168, 248, 328, 408,_
25. 27, 214, 221, 228, 235,_
26. 78, 28,-22,-72,-122,_
27. 951,1951,950,1950,949,_
28. 3,5,15,17,51,_
29. 15,225,16,256,17,_
30. 3.3,3.9,3.27,3.81,3.243,_
Answers.
21. 40 - Number calculating by subtracting 2. (48-2=46, 46-2=44, 44-2=42, 42-2=40)
22. 21 - Square the pattern starting, then take 5, add one, and square it again, and so on.(3*3=9, 9-5=4, 4+1=5, and 5*5=25)
23. 110 - This is number six (6) binary number system. (001-1, 010-2, 011-3, ... 110-6)
24. 488 - Difference is added to the previous number. (88+88=168, 168+88=248, ... 408+88=488)
25. 242 - First digit is fixed (2) and rest of the number are multiplication of 7.(2 7, 2 14, 2 21, 2 28, 2 35, 2 42)
26. -172 - Difference (-50) is added to the number. (78-50=28, 28-50=-22 ... -122-50=-172)
27. 1949 - Just add put number one (1) on the second number of each pair.
28. 53 - Answer is get by as follows. (3*5=15, 15+2=17, 3*17=51, 51+2=53)
29. 259 - (15*15=225, 16*16=256, 17*17=289)
30. 3.729 The left side of the "." is fixed to "3." and right side part is multiplied by 3 every time. Calculation done as follows.
(3.0+.3*3=3.9, 3.0+.9*3=3.27, 3.0+.27*3=3.81, 3.0+*.81*3=3.243, 3.0+.243*3=3.729)
Questions.
31. 6,13,27,55,_
Answers.
31. 111 - Number calculated by multiplying the previous number by 2 and adding 1. (6*2+1=13, 13*2+1=27, 27*2+1=55,
55*2+1=111)
Good..
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