Question

2, 6, 12, 20,...........?
(a) 28
(b)30
(c) 42
(d) 48.​

Answer 1

solution :

2+4=6

6+6=12

12+8=20

20+10=30

30+12=42

Ans. 2,6,12,20,30→42

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Answer 2

2×1 = 2

2×3 = 6 ie 2×(1+2)=6

2×6 =12 ie 2×(3+3)=12

2×10=20 ie 2×(6+4)=20

2×15=30 ie 2×(10+5)=30