IBM
Company
Logical Reasoning
Number Series
198, 194, 185, 169, ?
A. 92
B. 112
C. 136
D. 144
Read Solution (Total 7)
-
- 198-2*2=194
194-3*3=185
185-4*4=169
169-5*5=144 - 8 years agoHelpfull: Yes(12) No(0)
- Difference of consecutive terms increases in terms of squares ( 2^2,3^2,4^2,5^2)
Ans is D)144. - 8 years agoHelpfull: Yes(1) No(0)
- 198-194=4=2^2;
194-185=9=3^2;
185-169=16=4^2;
so the next difference will be the square of 5, 5^2=25;
so the next term is = 169-25=144
ans: 144
- 8 years agoHelpfull: Yes(1) No(0)
- Answer is D
- 8 years agoHelpfull: Yes(0) No(0)
- 198-194=4=2^2
194-185=9=3^2
185-169=16=4^2
169-x=25=> x=169-25=144=> x=144 - 8 years agoHelpfull: Yes(0) No(0)
- 198-(2)^2=194
194-(3)^2=185
185-(4)^2=169
169-(5)^2=144 - 7 years agoHelpfull: Yes(0) No(0)
- the difference is the square of numbers beginning from 2
so the last number in the series is 144. - 7 years agoHelpfull: Yes(0) No(0)
IBM Other Question
Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
1, 3, 4, 8, 15, 27, ?
A. 37
B. . 44
C. 50
D. 55
9, 27, 31, 155, 161, 1127, ?
A. 316
B. 1135
C. 1288
D. 2254