self Maths Puzzle

18:30::36:?
A 54 B 62
C 64 D 66

Read Solution (Total 1)

D 66

as 18 : (18*2-6)=30
similarly 36 : (36*2-6)=66
11 years agoHelpfull: Yes(4) No(1)

self Other Question

if
a/bc+d/ef+g/hi=1
find the value of a,b,c,d,e,f,g,h,i
if value is beetween 1 to 9. A rope and a lighter are given. The complete rope burns in 1hr,but rate of burning is not same. This means it is not necessary that 1/2 of rope burns in 1/2hr. Given the 1 rope & lighter, how would you measure 1/2 hr?