Interview Maths Puzzle Logical Reasoning Blood Relations

find the next number in 15,31,63,80,242,____?
a) 691
b) 451
c) 600
d) 728

Read Solution (Total 1)

d) 728

15*2+1= 31 & 31*2 +1=63 similarly
80*3+2=242 & 242*3+2=728
9 years agoHelpfull: Yes(7) No(0)

Interview Other Question

ad+a+b=259
bc+b+c=220
ac+a+c=339
what will be a+b+c? A motorboat, whose speed in 15km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. the speed of the stream (in km/hr) is:
(a) 4 (b) 5 (c) 6 (d) 10 (e) none of these