Subject :IMO Class : Class 7
Two-fifth of one-fourth of three-seventh of a number is 15. What is half of that number ?
A350
B96
C175
D196
Ans 1:
Class : Class 7
(2/5 x 1/4 x 3/7) x a = 15
6/140 x a = 15
a = (15 x 140)/6
= 2100/6
= 350
to find: a/2
a/2 = 350/2 = 175
So ans is C