Ques:- The average age of 12 students is 20 years. If the age of one more student is included, the average decreases by 1. What is the age of the new student?
A. 5 years
B. 6 years
C. 7 years
D. 9 years
Recent Answer : Added by DK On 2022-03-09 16:28:54:
Correct option is C)
Let be students are consider as child
Let the age of child added later be x years.
average age of 12 children =20 years
∴ Total age of 12 children =20×12=240 years
After one more child is added-
Average of 13 children =20−1=19 years
Average age of 13 children =
13
sum of 12 children+x
19=
13
240+x
⇒240+x=247
⇒x=247−240=7 years
Hence the age of child added later is 7 years.
Ques:- How many numbers greater than 5000 can be formed with four of the digits 3, 4, 5, 6, 7 where no digit can be repeated
Recent Answer : Added by Admin On 2022-09-29 17:47:29:
When none of the digits are repeated:
The hundred’s place can be filled by any of the digits: 2, 3, 5, 6, 7 or 8 except the one which has already been used at the thousand’s place, so it can be filled in 5 ways.
Similarly tens’ place can be filled in 4 ways: only those 4 numbers which have not been use either at hundred’s or thousand’s place.
Unit’s place can be filled in only 3 ways. So, total number of nos. Possible =4×5×4×3= 240
Ques:- There N stations on a railroad. After adding X stations on the rail route 46 additional tickets have to be printed. Find N and X
Recent Answer : Added by Rishabh Gupta On 2022-03-09 16:33:47:
Each PAIR of stations means a PAIR of tickets (A to B and B to A)
23 is a prime number with only two factors, 1 and 23
so N = 23 and X = 1
Ques:- The difference between the place value of 7 and 3 in the number 527435 is
A. 4
B. 5
C. 45
D. 6970
Recent Answer : Added by narendra On 2022-09-18 09:02:58:
D
Ques:- Why you want to work in our company?
Recent Answer : Added by DK BOSS On 2021-07-16 09:52:54:
I’m interested in this job because I can see that, in this role, my skills could help solve this problem within your company. I also see an opportunity for me to learn and grow these skills, so we both would benefit personally, professionally, and financially.
Ques:- A salt manufacturing company produced a total of 5000 tonnes of salt in January of a particular year. Starting from February its production increased by 100 tonnes every month over the previous months until the end of the year. Find its average monthly production for that year?
Recent Answer : Added by albin On 2021-03-25 16:51:46:
516 tones
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Ques:- For cascaded 1800 BTS with master 900 BTS,if 900 master BTS is down for its own equipment fault,cascaded slave 1800 BTS gets down/stop carrying traffic without any fault as BCCH and other controllong channels are in master 900 BTS.Is there any technology/
Recent Answer : Added by DK BOSS On 2021-07-30 16:26:20:
Might be using dual E1 in that case will be much more helpful.
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Ques:- There are 5 burglars and once went to a bakery to rob it obviously The first guy ate 1/2 of the total bread and 1/2 of the bread. The second guy ate 1/2 of the remaining and 1/2 of the bread. The third guy ,fourth guy and fifth guy did the same. After fifth guy there is no bread left out. How many bread are there?
Recent Answer : Added by Admin On 2020-05-17 12:04:12:
let the total no of breads be x.
1st man 2nd man
x- (x/2) – 1/2 – 1/2((x-1)/2) – 1/2 ….. so on.
ans is 31.
first ate : 15.5 + .5 = 16 remaining 15
second ate : 7.5+0.5 = 8 remaining 7.
third ate : 3.5 +0.5 = 4 remaining 3.
fourth ate : 1.5 + 0.5 = 2 remaining 1
fifth ate : 0.5 + 0.5 = 1 remaining 0
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Ques:- A dwarf-killing giant lines up 10 dwarfs from shortest to tallest.The giant randomly puts a white or black hat on each dwarf. No dwarf can see their own hat. The giant will ask each dwarf, starting with the tallest, if they answer incorrectly, then he will kill them.Each dwarf can hear the previous answers, but cannot hear when a dwarf is killed.The dwarves are given an opportunity to collude before the hats are distributed.What strategy should be used to kill the fewest dwarfs?
Ques:- Anita, Indu and Geeta can do a piece of work in 18 days, 27 days and 36 days respectively. They start working together. After working for 4 days. Anita goes away and Indu leaves 7 days before the work is finished. Only Geeta remains at work from beginning to end. In how many days was the whole work done?
Recent Answer : Added by Ax On 2021-04-09 17:38:12:
4.224 days
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Ques:- A and B can finish a work in 16 days while A alone can do the same work in 24 days. In how many days B alone will complete the work?
Recent Answer : Added by Evelyn Asumadu On 2021-09-22 16:57:03:
B will use 8days to work
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Recent Answer : Added by Atif On 2022-12-05 16:13:33:
512
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Ques:- The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?
Recent Answer : Added by Alisha Ravika Kar On 2022-08-14 16:43:27:
The number is greater than the number obtained in reversing the digits and the ten’s digit is greater than the unit’s digit
Let ten’s and unit’s digit be 2x and x respectively
Then, (10×2x+x)−(10x+2x)=36
9x=36
x=4
Required difference=(2x+x)−(2x−x)=2x=8
Correct option is C)
Let be students are consider as child
Let the age of child added later be x years.
average age of 12 children =20 years
∴ Total age of 12 children =20×12=240 years
After one more child is added-
Average of 13 children =20−1=19 years
Average age of 13 children =
13
sum of 12 children+x
19=
13
240+x
⇒240+x=247
⇒x=247−240=7 years
Hence the age of child added later is 7 years.