Number Series Questions for exams

Solve these Number Series problems and practice for competitive exams. People who love mathematics definitely enjoy solving Number Series Questions and answers.

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@surendra-jangu-bishnoi
Ans: 16800
Explanation:
700×2 = 1400
1400×3 = 4200
4200×4 = 16800
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Q. 6,40,156,310,309,?
Ans: 154
Explanation:
×8-8, ×4-4, ×2-2, ×1-1, ×0.5-0.5
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6,40,156,310,309,----

x+1/x=1
y+1/y= 3^1/2
Find the value of [ ( x^3)(y^6) -1 ]

@surendra-jangu-bishnoi:
700,1400,4200,...
7001=700
700
2=1400
14003=4200
4200
4=16800

@surendra-jangu-bishnoi:
700,1400,4200,...
7001=700
700
2=1400
14003=4200
4200
4=16800

49,47,46,45,44 these questions need explanation

700,1400, 4200,...?
A 5600
B 8400
C 16800
D none

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