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Sequence and Series
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1) -3 6 1 -2 4 -1 -1 2 -3 ?
2) 507 169 248 62 36 12 168 42 168 56 ?
3) 4 3 144 1.5 2 9 5 .3 2.25 3.2 2 ?
4) -5 1 -11 23 29 17 -20 -14 ?
5) 776 625 64 9 ?
6) 5 16 22 68 28 87 34 106 ?
7) 2 , 1/3, 2/3 ,6, 7, 1/2, 3 1/2,14,20,1/5,4 ?
8) 92 48 16 10 6.5 ?
9) 2 1 2 3 8 0 1 9 1 2 ?
10) 1,1/2,1 1/2 ,2 ,5 1/3,5 1/3,15 ,12 ,1/4, 12 1/4 ?
11) 6 9 11 13 17 20 22 24 28 31
12) -27 9 -3 81 -27 9 54 ?
13) 33 8 41 46 21 67 72 47 119 124 ?
14) 1/4,1/4 ,1/2 1 1/2, 6 ?
15) 3 4 12 76 588 ?
16) 3 8 12 48 29 ?
17) 9/8, 4/3, 12/8 ,3 1/3, 7/3, 42/8, 3 1/3, 7 1/4 ,1 3/3 , 7/2, 5 1/3 ?
18) 5 5 7 7 9 11 11 13 13 17 15 19 17 ?
For IBM Solve all series from M4 maths, most questions will be from here.
Read Solution (Total 45)
-
- 3. 4*3=12*12=144
1.5*2=3*3=9
5*0.3=1.5*1.5=2.25
3.2*2=6.4*6.4=40.96 - 8 years agoHelpfull: Yes(19) No(3)
- Ans 9 taking triplets at a time (2,1,2)=(2^1=2)
(2,3,8)=(2^3=8)
(8,0,1)=(8^0=1)
(1,9,1)=(1^9=1)
(1,2,1)=(1^2=1)
next digit will be 1
- 8 years agoHelpfull: Yes(14) No(0)
- (13) Make groups of three numbers each. In each group, middle no. is the difference of the other two no.s
You will see:
41-33=8
67-46=21
119-72=47 and so on
Check the difference b/w left most elements of each consecutive triplet. i.e.
46-33=13; 72-46=26; 124-72=52
For Middle No.
21-8=13; 47-21=26; ?-47=52
The answer will be 99. - 8 years agoHelpfull: Yes(12) No(8)
- 6) 5*4=20+2=22
5*5=25+3=28
5*6=30+4=34
so, 5*7=35+5=40(ans) - 8 years agoHelpfull: Yes(12) No(2)
- 8.ans=5.25
48*2-4=92
10*2-4=16
5.25*2-4=6.5
- 8 years agoHelpfull: Yes(12) No(2)
- 1) answer is 0
see alternate 3 digits there is adecrement of 1
- 8 years agoHelpfull: Yes(11) No(0)
- 4. -5-1=-6 for -11 (-5-6)
similarly 23-29=-6 for 17 (23-6)
-20-(-14)=-6 so -20-6=-26 - 8 years agoHelpfull: Yes(10) No(0)
-
Q 5:
7776 = 6^5
625 = 5^4
64 = 4^3
9 = 3^2
- 8 years agoHelpfull: Yes(10) No(1)
- 18) 5 5 7 7 9 11 11 13 13 17 15 19 17 ....
5+2=7, 7+2=9,9+2=11, 11+2= 13 , 13+2 =15 , 15+2 = 17
and
5+2=7 , 7+4= 11, 11+2 =13, 13 +4 = 17,17+2 = 19, so next is 19 +4= 23 - 8 years agoHelpfull: Yes(9) No(0)
- ans: 1) 0 0 -5
- 8 years agoHelpfull: Yes(7) No(0)
- 15) 3 4 12 76 588 ?
ans: 4684
4-3 = 1 (1^3)
12-4=8 (2^3)
76-12=64 (4^3)
588-76=512 (8^3)
4684-588=4096(16^3)
so the answer is 4684
- 8 years agoHelpfull: Yes(7) No(3)
- 12.
use triplet and divide first with -3 then second with 3 .and so on
- 8 years agoHelpfull: Yes(6) No(4)
- 2) 507 169 248 62 36 12 168 42 168 ?
Ans: 169*3= 507,62*4=248,12*3=36,42*4=168, ? *3=168
the ans is: 56.
- 8 years agoHelpfull: Yes(5) No(3)
- 3) 4 3 144 1.5 2 9 5 .3 2.25 3.2 2 ?
Ans: 4*3=12
12^2=144 (4,3,144)
1.5*2=3
3^2=9 (1.5,2,9)
.5*3=1.5
1.5^2=2.25 (.5,3,2.25)
3.2*2=6.4
6.4^2=40.96
hence the ans is: 40.96 - 8 years agoHelpfull: Yes(5) No(1)
- 4) -5 1 -11 23 29 17 -20 -14 ?
Ans: -5+6=1, -5-6=-11 (-5,1,-11)
23+6=29,23-6=17 (23,29,17)
-20+6=-14,-20-6=-26(-20,-14,-26)
hence the ans is: -26. - 8 years agoHelpfull: Yes(5) No(0)
- 5) 776 625 64 9 ?
this question is wrong.
it should be:
7776 625 64 9 ?
Ans: 6^5=7776, 5^4=625, 4^3=64, 3^2=9, 2^1=2 - 8 years agoHelpfull: Yes(5) No(0)
- 7) 100
2*1/3 = 2/3 , 2*3 = 6, 6+1 = 7
7*1/2 = 7/2. 7*2 = 14, 14+6 = 20
20*1/5 = 4, 20*4 = 100 - 8 years agoHelpfull: Yes(4) No(17)
- 1) -3 6 1 -2 4 -1 -1 2 -3 ?
Ans: (-3 6 1)
(-2 4 -1)
( -1 2 -3)
next number is: 0
- 8 years agoHelpfull: Yes(4) No(0)
- 14] 1/4 , 1/4 , 1/2 , 1 1/2 , 6
step 1: 1/4 , 1/4 ,1/2 , 3/2 , 6
step 2: 1/4 *1 = 1/4 *2 = 1/2 *3 = 3/2 *4 = 6 *5 =30
Ans is 30
- 7 years agoHelpfull: Yes(4) No(0)
- 7) 2 , 1/3, 2/3 ,6, 7, 1/2, 3 1/2,14,20,1/5,4 ?
it can be written as 2 , 1/3, 2/3 ,6, 7, 1/2, 7/2,14,20,1/5,4 ,
now take these series in the form of 4's
2 , 1/3, 2/3 ,6 (2, 1/3,2*1/3=2/3, 2/3*3^2=6)
7, 1/2, 7/2,14 (7, 1/2,7*1/2=7/2, 7/2*2^2=14)
20,1/5,4 , (20, 1/5,20/5=4, 4*1^2=4)
so ans=4
- 7 years agoHelpfull: Yes(3) No(5)
- 7) 2,1/3,2/3,6,7,1/2,3 1/2, 14 ,20,1/5, 4,?
now :- 2*1/3=6and 2/(1/3)= 2*3=6
again 7*1/2=7/2(= 3 1/2) and 7/(1/2)=7*2=14
so 20*1/5=4 and 20/(1/5)=20*5= 100
ANS 100 - 7 years agoHelpfull: Yes(3) No(1)
- 18) 5 5 7 7 9 11 11 13 13 17 15 19 17 ?
ans: 23, 19
- 8 years agoHelpfull: Yes(2) No(4)
- Ans 11) taking pair at a time (6,9) , (11,13) , (17,20), (22,24).... we get a difference of 3,2,2,4 in each pair respectively , which continues in the next pair also. Next number in the series is 33.
Ans12) taking triplets at a time (-27,9,-3), (81,-27,9) in each triplets no. are multiple of -3 therefore next triplet will be (54,-18-6)
next no. in the series -18
- 8 years agoHelpfull: Yes(2) No(3)
- 33+8=41
21-8=13...................
46+21=67
47-21=26...............
72+47=119
x-47=39...............
124+x=y
x-39=47
x=86...........
124+86=210=y..................
- 8 years agoHelpfull: Yes(2) No(5)
- 1)0 0 -5
2)56
4)-26
5)2
6)40
8)5.25
9)1
10)48
11)31
12)-18
13)99
15)4684
16)144
18)23 - 8 years agoHelpfull: Yes(2) No(2)
- 6.165
5+16+1^2=22
68+28-3^2=87
34+106+5^2=165 - 8 years agoHelpfull: Yes(1) No(1)
- 18) ans is 23 19
- 8 years agoHelpfull: Yes(1) No(0)
- (92,48)=48*2=96-4=92
(16,10)=10*2=20-4=16
(6.5,x)=>(x*2)-4=6.5
2x=10.5-->x=5.25 - 8 years agoHelpfull: Yes(1) No(0)
- 9) 2^1=2
2^3=8
8^0=1
1^9=1
1^2=1, so ans=1 - 7 years agoHelpfull: Yes(1) No(0)
- 13. 33,8,41,46,21,67,72,47,119,124,?
(33,8,41) 33+8=41
(46,21,67) 46+21=67
(72,47,119) 72+47=119
(124,?)
difference between ist two number in each group
first group 33-8=25
second group 46-21=25
third group 72-47=25
like that 124-x=25
x=99(answer) - 7 years agoHelpfull: Yes(1) No(0)
- 11) taking pair at a time (6,9) , (11,13) , (17,20), (22,24).... we get a difference of 3,2,3,2in each pair respectively , which continues in the next pair also.
Next number in the series is 31
6+3=9
11+2=13
17+3=20
22+2=24
hence next term is 28+3=31 ans
. - 7 years agoHelpfull: Yes(1) No(0)
- 8)
92/2=46+2=48
16/2=8+2=10
6.5/2=3.25+2=5.25
5.25 ans - 7 years agoHelpfull: Yes(1) No(0)
- 10)1,1/2,1,1/2,2-->1*2=2
2+3=5,1/3,1/3,5*3=15
15-3=12,1/4,12,1/4,12*4=48
ans=48 - 7 years agoHelpfull: Yes(1) No(3)
- Ans 13) taking triplets at a time middle no. is difference of other two . (33,8,41)= 41-33=8. The last no. of the triplet increases by 26, therefore last no. of the last triplet will 197 (124 , ??, 197 ). Therefore next no. of the series will be difference of 197 and 124 i.e 73.
- 8 years agoHelpfull: Yes(0) No(5)
- 1.make a pair of 3 .-3,-2,-1,0(answer).6,4,2,..and last 1,-1,-3,.. and answer is 0.
- 8 years agoHelpfull: Yes(0) No(0)
- alternate differences
6-(-3)=9
4-(-2)=6
2-(-1)=3
next set
1-6=-5
-1-4=-5
-3-2=-5
nextset
-2-1=-3
-1-(-1)=0
x-(-3)=3
x=0
Ans:0 - 8 years agoHelpfull: Yes(0) No(0)
- Q 6:
5 16 22 68 28 87 34 106 ?
5 * 3 + 1 = 16
22 * 3 + 2 = 68
28*3 + 3 = 87
and
28 -22 = 6
34-28 = 6
thus 40 - 34 = 6
ans= 40 - 8 years agoHelpfull: Yes(0) No(0)
- 3 4 12 76 588 ?
3-4=1
4-12=8
12-76=64(8^2)
588-76=512(8^3)
8^4=4096 - 8 years agoHelpfull: Yes(0) No(1)
- 4) (a,b,c) -> a*2-b=c
(-5,1,-11) -> -5*2-1=-11
(23,29,17) -> 23*2-29=17
(-20,-14,?) -> -20*2--14=-26
- 8 years agoHelpfull: Yes(0) No(0)
- 16) 3 8 12 48 29
3*3=9-1=8
12*4=48
29*5=145-1=144 - 7 years agoHelpfull: Yes(0) No(2)
- 13.ans 73
33+8=41
46+21=67
72+47=119
67-41=26
119-67=52(26x2)
119+(26x3)=197
197-124=73 - 7 years agoHelpfull: Yes(0) No(2)
- 7) 100
2*1/3=2/3, 2*3=6
7*1/2=7/2, 7*2=14
20*1/5=4, 20*5=100 - 7 years agoHelpfull: Yes(0) No(0)
- 49.) 1,3,3,2,8,10,3,4,12,4,8...............? ... Solution. 12. 1*3=3, 2+8=10 same as 3*4=12, 4+8=12
- 7 years agoHelpfull: Yes(0) No(1)
- 2.)
507 169 248 62 36 12 168 42 168 ,?
507/3=169
248/4=62.......
at last
168/3=56 - 7 years agoHelpfull: Yes(0) No(0)
- 16) 3, 8, 12, 48, 29, ?
Ans: (1^2)+2=3;
(2^2)*2=8;
(3^2)+3=12;
(4^2)*3=48;
(5^2)+4=29;
(6^2)*4=144=>Ans.
18) 5, 5, 7, 7
9, 11, 11, 13
13, 17, 15, 19
17, 23, 19, 25
so Ans=23 - 7 years agoHelpfull: Yes(0) No(0)
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