Study the following information and answer the questions that follow:
Rahul, Kartik, Adarsh and Jacob are students of a school. Three of them stay far from the school and one near it. Two study in class IV, one in class V and one in class VI. They study Hindi, Science, Maths and Social Science. One is good at all the four subjects while another is weak in all of these. Rahul stays far from the school and is good at Maths only while Kartik is weak in Maths only and stays close to the school. Neither of these two nor Adarsh studies in class VI. One who is good at all the subjects studies in class V.
Question 1
Name the boy who is good at all the subjects.
(A) Rahul
(B) Kartik
(C) Adarsh
(D) Jacob
Question 2
Name the boy who is weak in all the subjects.
(A) Rahul
(B) Kartik
(C) Adarsh
(D) Jacob
Question 3
Which two boys are good in Hindi?
(A) Rahul and Kartik
(B) Kartik and Adarsh
(C) Adarsh and Jacob
(D) None of these options
Question 4
Which two boys are good in Maths?
(A) Rahul and Adarsh
(B) Kartik and Adarsh
(C) Jacob and Adarsh
(D) Rahul and Jacob
Question 5
Other than Rahul and the boy good at all the subjects, who else stays far from the school?
(A) Can’t be decided
(B) Kartik
(C) Adarsh
(D) Jacob
N.B. Please note that the official timings for publication of these questions is 11 am daily.
SOLUTIONS TO DAILY CSAT MISSION # 87
1. (C) 2. (D) 3. (B) 4. (D) 5. (C)
Explanations
1. Total rainfall during the week = Rainfall in the first six days + Rainfall on the seventh day.
So, 1 cm x 7 days = 0.8 cm x 6 days + Saturday’s rain, which gives Saturday’s rain = 7 – 4.8 = 2.2 cm.
2. Consider the following image from A to B as a representation of the travels:
From this, it is clear that he is only 3 Km away from the starting point and is headed due west after the latest left turn.
3. Let the total work be 24. Since Kavya completes it in 8 days, her rate of work = 3/day.
Similarly, if Rekha completes it in 12 days, her rate of work = 2/day.
When they work together, Rekha will do 2 work in the same time that Kavya will do 3 work. So, Rekha is contributing 2 work out of a total of 5 work i.e. she is putting in 40% of the total effort, which means she will get 40% of the reward i.e. 40% of 3000 = 1200.
4. Let the amount of milk to be added be ‘x’ litres.
Initially, amount of milk in the mixture = 20% of 125 = 25 litres.
After adding ‘x’ litres of milk, the mixture becomes (125 + x) litres and the milk becomes (25 + x) litres.
Given, (25 + x) = 33% of (125 + x), which on solving gives x = 25 litres.
5. Numbers are ontained in the series by adding the digits of the previous number to the previous number.
Hence the number after 67 = 67 + 6 + 7 = 80.
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