if 21 3 32 7 82 22 92 25 than 72

2*1+1=3
3*2+1=7
8*2+6=22
9*2+7=25
so
7*2+5=19
here the digit we are adding is d difference bw both digit.
like 7-2=5
8 years agoHelpfull: Yes(12) No(3)
2*1+(2-1)=3
3*2+(3-2)=7
8*2+(8-2)=22
9*2+(9-2)=25
7*2+(7-2)=19 Ans
8 years agoHelpfull: Yes(2) No(0)
21=>(2*1)+(2-1)=3
32=>(3*2)+(3-2)=7
.
.

72=>(7*2)+(7-2)=19
8 years agoHelpfull: Yes(2) No(0)
ans=19
2*1+(2-1)=3
3*2+(3-2)=7
8*2+(8-2)=22
9*2+(9-2)=25
same way 7*2+(7-2)=19.
8 years agoHelpfull: Yes(1) No(0)
32 = 7
42 = 10
52 = 13
62 = 16
72 = 19
8 years agoHelpfull: Yes(1) No(0)
2*1 + 1*1 =3
3*1 + 2*2 =7
8*2 + 2*2 =22
9*2 + 2*3 =25
7*3 + 2*3 =27
8 years agoHelpfull: Yes(0) No(3)
multiply both the digit and add value of (tenth place - unit place digits)
2*1+(2-1)=3
3*2+(3-2)=7
8*2+(8-2)=22
9*2+(9-2)=25
so
7*2+(7-2)=19
8 years agoHelpfull: Yes(0) No(0)
19 Ans
(7*2)-(7-2)
8 years agoHelpfull: Yes(0) No(0)
2*1=2 and 2-1=1 so 2+1=3
3*2=6 and 3-2=1 so 6+1=7
8*2=16 and 8-2=6 so 16+6=22
...........................................
7*2=14 and 7-2=5 so 14+5 =19 ans.
8 years agoHelpfull: Yes(0) No(0)
How would u know that after 9 next no will be 7?
8 years agoHelpfull: Yes(0) No(0)

if
21=3
32=7
82=22
92=25
than
72=?