A family has several children. Each boy of this family has as many brothers as sisters but each girl of this family has twice brothers as many sisters. What is the number of siblings in the family?
Come back tomorrow for the correct answer to this teaser.
Answer for yesterday's Brain Teaser
Shyam can do 3/4 of a work in 6 days, while Radha takes 4 days to complete 2/3 of the same work and it takes 6 days for John to complete the 2/5 of the same work. All of them started working together and worked for 2 days before Radha and John decided to quit. Now, if it is left to Shyam to complete the remaining work, then how long will it takes for Shyam to complete the remaining work?
Answer
Time taken by Shyam to complete the work alone = (6 × 4)/3 = 8 days
Time taken by Radha to complete the work alone = (4 × 3)/2 = 6 days
Time taken by John to complete the work alone = (6 × 5)/2 = 15 days
Work done by all in 2 days = 2(1/8 + 1/6 + 1/15) = 43/60
Remaining work = 1 – 43/60 = 17/60
Time taken by Shyam to complete 17/60 of the remaining work
= (17/60 ÷ 1/8) days
