Answer Posted / chirag
20. The set X consists of the following terms : {4,44,444,4444,.....), where the nth term has n 4's in it for example 10th term is 4444444444. what is the hundreds digit of the sum of the first 45 terms of set S?
A. 5
B. 3
C. 1
D. 6
E. 9
Reason 45*4=180, thus the units digit will be 0 and 18 will be carried over to the tens digit;
44*4+18=194, thus the tens digit will be 4 and 19 will be carried over to the hundreds digit;
43*4+19=191, thus the hundreds digit is 1.
| Is This Answer Correct ? | 5 Yes | 0 No |
Post New Answer View All Answers
Two pipes A and B when working alone can fill a tank in 36 minutes and 45 minutes respectively. A waste pipe C can empty the tank in 30 minutes.First A and B are opened After 7 minutes. C is also opened . In How much time will the tank be full ?
9/10 or 10/11 which is greater.
Dear Sir/ Madam, Kindly send me the model question answers for RRB-Technician Signal(Physics/Maths) to saranya67veena@gmail.com
12 men can build wall of length of 12m in 10 days how many men are required to build 20 m in 15 days.
A & B are playing a game .There are 8 oranges in a row on the table.one Player can take 1-4 oranges in a pick (a maximum of 4),one who picks the last orange wins the game.'A' plays first How many oranges should he pick first time inorder to win the game.
The mean and the variance of a binomial distribution are 4 and 2 respectively. Then the probability of 2 successes is?
Lucia is a wonderful grandmother and her age is between 50 and 70. Each of her sons have as many sons as they have brothers. Their combined ages give Lucia's present age.what is the age?
WHO WAS GIVEN BEST ACTOR AWAR 2010 IN FILM FARE?
There is a rectangular terrace whose length and width are 60m X 20m. There is a walkway of uniform width around terrace. Area of walkway is 516m^2. Find width of walkway:
A beats B by 10 meters and B beats C by 15 meters the A beats C by
In a party there are women and cats.There are 18 heads and 72 legs altogether. How many women and cats?
Hello!!I have appllied for the post of Jr.Executive(ATC).My educational qualification is B.Tech(IT).I ould like to know if the questions in technical section will be based on IT alone or else also from other subjects also like electrical/electronics/civil/tele communication.I will be grateful for a relevant answer.thank you in advance
X and Y are partners in a business. X invests 300 for 12 months and Y invested 600 for 6 months. If they gain a profit of 700 at the end of one year, what is X's share?
there is a 4 inch cube painted on all sides. this is cut into no of 1 inch cubes. what is the no of cubes which have no pointed sides.
There are 3 societies a,b,c. a lent tractors to b and c as many as they had. After some time b gave as many tractors to a and c as many as they have. After sometime c did the same thing. At the end of this transaction each one of them had 24. Find the tractors each originally had.
