Self
Maths Puzzle
Numerical Ability
Arithmetic
8,7,5,2,-2,....find 8th term of this sequence
Read Solution (Total 10)
-
- 8,7,5,2,-2,...
8-1=7
7-2=5
5-3=2
2-4=-2
-2-5=-7
-7-6=-13
-13-7=-20
8, 7, 5, 2, -2, -7, -13, -20, -28
8th term = -20 - 10 years agoHelpfull: Yes(3) No(0)
- 8 - 1 =7
7 - 2 = 5
5 - 3 = 2
2 - 4 = -2
-2 - 5 = -7
-7 - 6 = -13
-13 - 7 = -20
-20 - 8 = -28
Ans : -28 - 10 years agoHelpfull: Yes(0) No(1)
- 20
difference is in terms of 1,2,3,4,5,6,7
- 10 years agoHelpfull: Yes(0) No(0)
- 1st term= 8
2nd term=8-1=7
3rd term=7-2=5
4th term=5-3=2
5th term=2-4=-2
6th term=-2-5=-7
7th term=-7-6=-13
8th term=-13-7=-20 - 10 years agoHelpfull: Yes(0) No(0)
- Sorry 8th term is : -20
- 10 years agoHelpfull: Yes(0) No(0)
- -20
difference is in terms of 1,2,3,4,5,6,7 - 10 years agoHelpfull: Yes(0) No(0)
- 8-1=7
7-2=5
5-3=2
2-4=-2
-2-5=-7
-7-6=-13
-13-7=-20 - 10 years agoHelpfull: Yes(0) No(0)
- 8-1=7
7-2=5
5-3=2
2-4=-2
-2-5=-7
-7-6=-13
-13-7=-20
the series is 8 7 5 2 -2 -7 -13 -20.
and the 8th term is -20. - 10 years agoHelpfull: Yes(0) No(0)
- subtract minus 1 from each value
so 6 th is -2-5=-7
7th is -7-6=-13
8th is -13-7=-20 - 10 years agoHelpfull: Yes(0) No(0)
- 8-7=1
7-5=2
5-2=3
2-(-2)=4
so next should be 5,then
-2-x=5==>x=-7,
-13
-20 - 10 years agoHelpfull: Yes(0) No(0)
Self Other Question