1. Which number replaces the question mark ?
6,9,15,27,?
A:- 51
6
6+3= 9
9+6(3*2)=15
15+12(6*2)=27
27+24(12*2)=51 .
Another solution:-
6
6+6 = 12-3 = 9
9+9 = 18-3 = 15
15+15 = 30-3 = 27
27+27 = 54-3 = 51.
2. Which number replaces the qustion mark ?
26,28,31,35,?
A:- 40
26
26+2=28
28+3=31
31+4=35
35+5=40.
3. Which letter replaces the question mark?
O,T,T,F,F,S,S,E,?
A:- N
One
Two
Three
Four
Five
Six
Seven
Eight
Nine.
6,9,15,27,?
A:- 51
6
6+3= 9
9+6(3*2)=15
15+12(6*2)=27
27+24(12*2)=51 .
Another solution:-
6
6+6 = 12-3 = 9
9+9 = 18-3 = 15
15+15 = 30-3 = 27
27+27 = 54-3 = 51.
2. Which number replaces the qustion mark ?
26,28,31,35,?
A:- 40
26
26+2=28
28+3=31
31+4=35
35+5=40.
3. Which letter replaces the question mark?
O,T,T,F,F,S,S,E,?
A:- N
One
Two
Three
Four
Five
Six
Seven
Eight
Nine.
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