IBM
Company
Logical Reasoning
Number Series
18, 24,5, 21,27,8,17,23,4,24,30,..?
Read Solution (Total 11)
-
- given series 18,24,5,21,27,8,17,23,4,24,30,?
take a group of triplet
take the corresponding difference
e.g
21-18 = 3
27-24 = 3
8-5 =3
17-21 = -4
23-24 = -4
4-8 = -4
24-17 = 7
30-23 = 7
ans - 4 = 7
=> ans = 7+4=11
the missing no. is 11 - 10 years agoHelpfull: Yes(26) No(2)
- 18+6=24,24-19=5,21+6=27,27-19=8........
30-19=11 - 10 years agoHelpfull: Yes(15) No(1)
- take agroup of triplet then it becomes
18-5=13
24-5=19
21-8=13
27-8=19
17-4=13
23-4=19
24-11=13
30-11=19
SO take the common difference of R.H.S of every equation then will get 11
Hence,ans = 11 - 10 years agoHelpfull: Yes(7) No(0)
- first of all the series will be 18,24,5,21,27,8,17,23,4,24,30,?The solution is... 18+6=24,24-19=5 21+6=27,27-19=8 17+6=23,23-19=4 24+6=30,30-19=11 so 11 is the next term.
- 10 years agoHelpfull: Yes(3) No(1)
- (18,24,5),(21,27,8),(17,23,4),(24,30,11) bcoz 24-5=19,27-8=19,23-4=19,hence 30-11=19. so next no is 11.
- 10 years agoHelpfull: Yes(2) No(0)
- Ans: 2
2+4-1=5, 2+7-1=8, 2+3-1=4, in the same way 3+0-1=2
- 10 years agoHelpfull: Yes(1) No(2)
- 4+7 =11 should be correct ans.Make a group of 3 nos.,21-18=3=27-24 & 3+5=8 follow these steps in next term too
- 10 years agoHelpfull: Yes(0) No(0)
- The difference between adjacent numbers will be +6,-19,+16,+6,-19,+9,-19,+20,+6. In which we can note that whenever we get a +6 next will be -19 hence answer will be 30-19=11
- 10 years agoHelpfull: Yes(0) No(0)
- first take first 3 digits (18,24,5)
diff b/w 18 nd 24 is =6
diff b/w 24 and 5 is =19
so final term is (24,30,x)
here x=11
ans:11 - 10 years agoHelpfull: Yes(0) No(0)
- 11 will be the answer
- 10 years agoHelpfull: Yes(0) No(0)
- 24-18=6
24-5=19
...
30-24=6
30-x=19
x=11
ans is 11 - 10 years agoHelpfull: Yes(0) No(0)
IBM Other Question
1) 1/4, 1/4, 1/2, 3/2, 6, ?
2) 0.8, 1.8, 3.6, 3.6, 4.6, 9.2, 9.2, 10.2, ?
3) 22, 19.5, 21.45, 33, 30.5, 33.55, 44, 41.5, ?
4) 15 3/4, 16, 26, 9 1/5, 9, 19, 64 2/3, 65, 75, 30 3/8, ?
5) 3, 2, 1, 4, 5, 4, 5, 1, 0, 6, 3, ?
6) 3/2, 2 1/4, 9/4, 7/2, 12 1/4, 49/4, 4/3, 1 1/7, 16/9, ?
7) 18, 24, 5, 21, 27, 8, 17, 23, 4, 24, 30, ?
8) 100, 98, 95, 90, 83, ?
9) 1, 3, 3, 2, 8, 10, 3, 4, 12, 4, 8, ?
10) 49, 7, 98, 16, 4, 48, 9, 3, 36, 25, 5, ?
11) 9, 12, 4, 8, 12, 15, 5, 9, 3, 6, 2, 6, 6, 9, ?
12) 5/6, 1/3, 1/2, 1/2, 2/8, 1/4, 5/6, 1/6, 2/3, 1/2, 1/3, ?
13) 33, 8, 41, 21, 67, 72, 47, 119, 124, ?
14) 1/7, 3/4, 4/9, 5/6, 7/11, 7/8, ?
15) 7, 4, 6, 3, 4.5, 1.5, 2.25, -0.75, ?
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