20 )P and Q are two points 100 km apart. A starts running from P towards Q at 10 km/hr. B starts running from Q at exactly the same time and in the same direction as that of A at 20 km/hr. After an hour, B turns back and changes his speed to 10 km/hr. After another hour, B again turns back and changes his speed to 20 km/hr. He keeps on changing his speed and direction in this manner till the time he meets A. After how much time will A and B meet for the first time
Ching, Ping and Ming work at the iphone 5 factory. As a team they have a target of assembling 120 iphones per day. 3 of them working together can assemble 15 phones in an hour. Ming, the fastest of the 3 can assemble 6 phones an hour. However, he fell sick and left after working for 5 hours. how many hours did ching and ming work if they just met the target?
1)10hrs, 2)9hrs, 3)5 hrs, 4)cannot be determined.
In how many ways 4 candidates can be selected for a job which contains 2 rounds and 10 candidates have appeared for the recruitment programme?
In a group of twenty friends, A, B, and C have the same age. X is as old as Y but not as old as A, B, and C. Nobody else in the group is as old as the other. In how many ways all the friends can stand in an increasing order of their age?
One-fourth portion of each of the two solid spheres having radii 4 units and 6 units are joined together such that the centres of the two spheres coincide as shown in the figure given below. What is the total surface area of the solid thus formed?
options:88 pie
83 pie
77 pie
75 pie
78 pie
A boat takes 8 hours for a round trip in a stream. if speed of boat doubles in still water then time taken would be 3 hours 12 min. find Boat:stream..
Help me out guize,
(37^64-27^64) divided by 64, calculate the remainder,
the answer is 0, i.e. sixty four completely divides the number...
a man leaves office daily at 7pm. a driver comes to pick him from office and bring him home. One day, he gets free at 5.30pm and instead of waiting for the driver he decides to walk home. On the way he meets the driver and returns home in the car.he reaches home 20 min earlier than usual. Had he becomes free at 6, how much early would he have reached?
he would have reached home 13 minutes 20 seconds earlier
There are 40 students in a class. 25 students do not like Milk. 10 students like Coffee. What is the minimum number of students who like Milk but do not like Coffee?
2^1001 finds the tens place. The answer is 5, I need to understand the funda. I am trying to solve this one using cyclicity of last two number of 2^n. Is there a simpler method for this? Thanks guize.
How many 7 digit numbers are there having the digit 3 three times and the digit 5 four times?
a) 7!/(3!)(5!)
b) 3^3*5^5
c)7^7
d)35
How many 4 digit numbers divisible by 5 can be formed with the digits 0,1,2,3,4,5,6 and 6?
a) 220
b) 588
c) 432
d)216
e)288
There are V lines parallel to the x-axis and 'W' lines parallel to the y-axis.How many rectangles can be formed with the intersection of these lines?
a)vP2.wP2
b)vC2.wC2
c)(v-2)C2.(w-2)C2
d)vwC2
e)None of these
Along a long corridor there are 100 doors marked as 1,2,3....100.as u know the doors can be in two states- 0pen or close.initially all doors are open.person number 1 changes the state of all doors that a multiple of 1 i.e basically all doors.person 2 then changes the state of all doors that are multiple of 2.person 3 then changes state of all doors that are multiple of 3adn so on till the person number 100 changes state of door 100. how many doors are closed??
- t
- t
0 voters
IF x + (1/x) = 2, solve (x^5 + (1/x)^5)?
There are T taps numbered 1,2,3....T, each of which can fill a tank. The rate of filling of nth tap is such that it is equal to twice that of all the tapes 1,2,3.....(n-1) put together. If the 18th tap can fill the tank in 1 min. Find the time in which 14th tap alone can fill the tank.
1)72 min
2)27 min
3)54 min
4)81 min
5)108 min
6364
- 6364
- 6570
- 8060
- 5250
0 voters
10 thieves steal x gold coins and escape.while all are asleep,2 thieves wake up and divide the coins between them and find 1 coin extra.just then 3rd thief wake up .so the thieves divide all the coins between them and find 2 coins extra.this continues till the 10th thief wake up and on dividing the coins among them 9 coin are extra,what is the least value of x??
- o
- p
0 voters
With an average speed of 40 km/hr the train reaches the final destination on time.if it was travelling at 35km/hr .the train would be late by 15 minutes. what is the journey distance?
- 40
- 70
- 30
- 80
- 60
0 voters