self Maths Puzzle Logical Reasoning Number Series

12,6.5,7.5,12.75,27.5,71.25,?
what will be the next no???????

Read Solution (Total 2)

6.5*1+1
7.5*1.5+1.5
12.5*2+2
27.5*2.5+2.5............ans is 261.75
11 years agoHelpfull: Yes(11) No(4)

12*0.5+0.5
6.5*1+1
7.5*1.5+1.5
12.75*2+2
27.5*2.5+2.5
71.25*3+3=216.75 so ans is 216.75
9 years agoHelpfull: Yes(3) No(1)

self Other Question

if a,b,c,d,p and q are non zero , unequal integer and (a+bi)/(c+di), then a^2+b^2/c^2+d^2 equal pure milk contains 89% of water.How much water has been added to pure milk to form a sample of 22 litre milk containing 90% water.