NTSE Stage 2 MAT 2018 Exam Question Paper

Question : 66 of 100

Marks: +1, -0

I noticed that my watch goes

1/2

minute fast at dusk, but at dawn it loses

1/3

minute. On 1 st march morning my watch showed right time, then on which of the following dates the watch was 5 minutes fast?

Solution:

Clock was at right time on 1st march morning.
It

1/2

was min fast at dusk (evening)
And

1/3

min loose at dawn (morning)
So in one day it was

1/6

min fast.
∴ 5 min fast in 30 days.
1st + 30 → On 31st march it was 5 min fast.

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