Let the unit’s digit be x Ten’s digit = x – 1 Number = 10 (x – 1) + x = 10x – 10 + x = 11x – 10 New number obtained after reversing the digits = 10x + x – 1 = 11x – 1 According to the question 3(11x – 10) + (2/3) x (11x – 1) = 171 33x – 30 + 22x/3 – 2/3 = 171 99x – 90 + 22x – 2 = 171 x 3 121x – 92 = 513 121x – 92 = 513 x = 605/121 = 5 Number = 11x –10 = 11 × 5 – 10 = 45 Sum of digits = 4 + 5 = 9
Saurabh can complete a piece of work in 20 days. He worked for 5 days and left. Anirudh completed the remaining work in 12 days. If both had done the ...
A and B together can do a work in 8 days. If A can alone do the same work in 24 days, then in how many days B alone will do the same work?
8 children and 6 women together can complete a piece of work in 10 days and work done by a children in one day is one-third of the work done by a women ...
A is twice efficient as B and B can do a piece of work in 40 days. B started the work and after a few days A joined him. They completed the work in 32 ...
A and B can do a work in 24 days and 32 days, respectively. If A works on it for ‘x’ days and B works on it for ‘x – 1’ days, then one-third o...
A man, a woman and a boy can do a work in 3, 2, 6 days respectively. How many children were required with 1 man and 1 woman to complete the same work in...
A contractor undertook to make 20 km of roadway in 48 weeks. In 28 weeks, 8 km was completed by 120 men working 12 hours a day. The men then agreed to w...
5 girls can do a piece of work in 9 days, 4 boys can do the same piece of work in 8 days, 6 men do the same piece of work in 2 days and 4 women can do t...
Working individually, 'A' can finish 60% of a task in 18 days, and 'B' takes 15 days longer than 'A' to complete the entire task. However, 'B' and 'C' w...
A alone can finish the work in 10days and B alone can finish the same work in 15 days. All A, B and C together take 5 days to finish the work. Find the ...
