bishoo123 Sayscan you explain the bold one.
convalesce SaysWhat will be the last four digits in expansion of 2^999
Total points formed from the intersection : (6c2)c2 = 105
Number of existing lines from these points : 6*5c2 = 60
So, 105-60 = 45
N is the sum of the squares of three consecutive odd numbers such that all the digits of N are the same. If N is a four-digit number, then the value of N is:
a. 7777 b. 9999 c. 3333 d. 5555 e.2222
(CAT 2005)
A chemical plant has four tanks (A, B, C, and D), each containing 1000 litres of a chemical. The chemical is being pumped from one tank to another as follows:
From A to B @ 20 litres/minute
From C to A @ 90 litres/minute
From A to D @ 10 litres/minute
From C to D @ 50 litres/minute
From B to C @ 100 litres/minute
From D to B @ 110 litres/minute
Which tank gets emptied first, and how long does it take (in minutes) to get empty after pumping starts?
Choose one answer.
a. A, 16.66
b. C, 20
c. D, 20
d. D, 25
2
(CAT 2005- 2 Marker)
A telecom service provider engages male and female operators for answering 1000 calls per day. A male operator can handle 40 calls per day whereas a female operator can handle 50 calls per day. The male and the female operators get a fixed wage of Rs. 250 and Rs. 300 per day respectively. In addition, a male operator gets Rs. 15 per call he answers and a female operator gets Rs. 10 per call she answers. To minimize the total cost, how many male operators should the service provider employ assuming he has to employ more than 7 of the 12 female operators available for the job?
Choose one answer.
a. 15
b. 14
c. 12
d. 10
15627
Which number is on the opposite side of number 7?
Choose one answer.
a. 12
b. 11
c. 10
d. 6
My answer :option :6
7 - 6
8 - 10
9 - 5
Calculation :
6 + 8 + 5 = 19
7 + 8 + 5 = 20
7 + 10 + 5 = 22
7 + 10 + 9 = 26
15626
Which of the following cannot be the order in which Sarojini types them?
Choose one answer.
a. 24351
b. 13542
c. 45231
d. 23145
My answer : option c
see the prob this way
Pick 1009 distinct numbers from the sequences
{1, 11, 21, ..., 2001}, {2, 12, 22, ..., 2002}, ..., {10, 20, 30, ..., 2010} such that no two numbers in the same sequence are consecutive.
so now take one sequence
{1, 11, 21, ..., 2001}
maximum number of terms u can take is 101 which can be done in one way ...
what if it 100 terms are selected ..
in other words in how many ways u can select 100 numbers out of 201 numbers ??
answer is ( 201 C 2 + 201 ) or 202 C 2 { std formula }
now 10 such sequence are there
hope this helps
Hi folks,
I appreciate you guys for putting up sets for practice, let's add more value to this thread.
Here's the one from my side for practice...
Friday morning, local pediatrician Dr. Johnson N. Johnson had appointments with five infants scheduled at
9:00, 9:30, 10:00, 10:30, and 11:00. Each of the five, including the Ortiz baby, is a different number--1, 2, 3, 4,
or 5--of months old. The following notes are available.
1. Immediately after seeing infant Beth, Dr. Johnson examined the Majors infant, who is 2 months younger than
Beth.
2. Erica isn't the one of the five who is 1 month old.
3. The doctor saw David later in the morning than the 1-month-old.
4. The 9:30 appointment was with the 3-month-old baby.
5. The Luce infant isn't the one who is 5 months of age.
6. Dr. Johnson saw the Nash infant, then examined Alice, who is 2 months older than the Nash baby.
7. The pediatrician's 10:00 appointment was with Chad, who isn't the Majors or the Nash baby.
8. The Prior baby isn't the 1-month-old and wasn't the doctor's 9:00 examinees.
Q.1. How old(in months) is infant Beth?
a. 1 b. 2 c. 3 d. 4 e. 5
Q.2 At what time did infant Erica meet the doctor?
a. 9 b. 9:30 c.10 d. 10:30 e.11
Q.3 Whose baby is infant Chad?
a. Ortiz b. Majors c. Luce d. Nash e. Prior
Q.4 Which of the following is not correct w.r.t infant David
a. He is Nash's baby
b. He is 2 months old
c. His appointment was at 11.00
d. none of these
e. His appointment was at 10:30
Q.5 Who was the last infant to meet the doctor?
a. Alice b. David c. Chad d. Erica e. Beth
come on folks not a tough one....