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Rohit has three children: two daughters and one son. All were born on the same date in different years. The sum of the ages of the two daughters today is smaller than the age of the son today, but a year from now the sum of the ages of the daughters will equal the age of the son. Three years from today, the difference between the combined ages of the daughters and the age of the son will be

Correct

Answer : 4. –2
Explanation:
one year from now, D+d=s
two years after that, D+2+d+2=s+2
D+d-s=2-4=-2

Incorrect

Answer : 4. –2
Explanation:
one year from now, D+d=s
two years after that, D+2+d+2=s+2
D+d-s=2-4=-2

Question 8 of 10

8. Question

1 points

Category: Quantitative Aptitude

Ajay and Praveen are running on a circular track of length 500m. The Speed of Ajay is 40 m/s and that of Praveen is 30 m/s. They start from the same point at the same time in the same direction. When will they meet again for the first time?

Correct

Answer : 3. 50 s
Explanation :
Time = Distance/Relative Speed = 500/10 = 50 s

Incorrect

Answer : 3. 50 s
Explanation :
Time = Distance/Relative Speed = 500/10 = 50 s

Question 9 of 10

9. Question

1 points

Category: Quantitative Aptitude

Praveen and Suresh invested some amount of money in the ratio of 3:5 for the same period in the business. They decided that at the end of the year 20% profit was to be given to an organization as a donation. Out of the remaining, 75% was to be reinvested and the rest of the profit was to be divided as interest on their capitals. If the difference in their share is Rs. 2400. What is the total profit?

Correct

Answer : 3. 48000
Explanation :
Let the total profit = 100
Amount left after donation = 50
Amount left after reinvestment = 20
Now, 5x/8 – 3x/8 = 2400
⇒ 2x/8 = 2400 = 9600
⇒ 1/5 of y = 9600 => y = 48000

Incorrect

Answer : 3. 48000
Explanation :
Let the total profit = 100
Amount left after donation = 50
Amount left after reinvestment = 20
Now, 5x/8 – 3x/8 = 2400
⇒ 2x/8 = 2400 = 9600
⇒ 1/5 of y = 9600 => y = 48000

Question 10 of 10

10. Question

1 points

Category: Quantitative Aptitude

The total salary of George and Sathish in a production company is Rs 30000. If the salary of George increases by 5% and salary of Sathish increases by 7%, then their total salary would be increased to Rs 31800. Find the salary of Sathish ?

Correct

Answer : 2.Rs.15,000
Explanation :
7% increases 30000 = Rs 2100 =30000+2100 = Rs 32,100
But the actual increase in salary = 31800
Difference =32100 – 31800 = 300
2% = 300
George’s salary =300/2 x 100 = 15000
Sathish’s salary =30000 – 15000 = Rs 15000

Incorrect

Answer : 2.Rs.15,000
Explanation :
7% increases 30000 = Rs 2100 =30000+2100 = Rs 32,100
But the actual increase in salary = 31800
Difference =32100 – 31800 = 300
2% = 300
George’s salary =300/2 x 100 = 15000
Sathish’s salary =30000 – 15000 = Rs 15000

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