2n has 28 divisors 3n has 30 divisors 6n has how many divisors???
The integer sequence a1, a2, a3, ... satisfies a(n+2) = a(n+1) - a(n) for n > 0. The sum of the first 1492 terms is 1985, and the sum of the first 1985 terms is 1492. The sum of the first 2001 terms is (a) 986 (b) 0 (c) 1476 (d) none of the foregoing
A two digit number equals the excess of the square of its unit digit over the square of its tens digit. What is the sum of its digits?a)9
b)10
c)11
d)12
b
Two real non-negative nos satisfy ab>=a^3+b^3. find max value of (a+b)
I dont have OA
- without OA I wont solve :mg:
- 2
- 3/2
- 1
- 1/2
0 voters
A dishonest dealer claims to sell a product at its cost price. He uses a counterfeit weight which is 20% less than the real weight. Further greed overtook him and he added 20% impurities to the product. Find the net profit percentage of the dealer?
2/5+6/25+12/125+20/625+30/3125+.......... What is the value of the series?
- 13/16
- 39/50
- 25/32
- 4/5
0 voters
Find the number of positive integral solutions for a + b + c = 100, such that a > 1, b > 2, c > 3
Post the approach too 😁 😃
help?
Directions: Two buses A and B started simultaneously from city P towards Q. The average speed of bus A is 25% more than that of B (without considering stoppages). Bus B has 2 stops between P and Q, where it has to stop for 15 minutes at each stop whereas bus A doesn't stop anywhere, bus B reached city Q one hour after bus A.If bus B wants to reach city Q at 1 pm, at what time has it to leave city P?
1. 8 am
2. 9 am
3. 10 am
4. 10:30 am
5. 11 am
Directions: Two friends A and B start simultaneously from two points P and Q which are 100 m apart. After they reach Q and P again they return to P and Q respectively. They keep on walking in between P and Q with out stopping anywhere. The ratio of their speeds (A and B) is 3 : 2.What is the distance travelled by B, by the time, when both A and B meet for the 8th time?
1. 600 m
2. 400 m
3. 200 m
4. 800 m
5. 320 m
Two friends purchased an article for and both of them paid for it.
First A paid 50% of the money then B paid 50% of the remaining .Again A paid 50% of the remaining and then B,and the process continues until the article is fully paid for ?What percentage of total cost of article is paid by A?
- 66.66
- 75
- Cannot be determined
- 33.33
- 50
0 voters
At the end of 1998,a man bought 9 dozen goats.Henceforth every year he added p% of the goats at starting of yesr and sold q% of goats at the end of year where p,q>0.
If he had 9 dozen goats at the end of 2002,after making the sales of that year,which of the following is true?
- Can't Say
- p=q/2
- p
- p>q
- p=q
0 voters
post the explanation 😃
Find the smallest number n for which (2^2-1) (3^2-1) (4^2-1) .......(n^2-1) is a perfect square
a) 16
b) 8
c) 12
d) 32
The number of distinct equations of the type Ax^2+Bx+C=0 that can be formed when A,B,C are selected from {1,2,3,4,5,6}
1.216
2.198
3.181
4.120
Dont have OA,need solution and approach!!
The number of integral solutions of mod(x)+mod(y)+mod(z)=10
a 402
b 304
c 202
d 502
Dont have OA.need approach please 😃
A father starts from home at 3.00 pm to pick up his son from school at 4 pm. One day the school got over early at 3 pm. The son started walking home. He met his father on the way and both returned 15 mins earlier than usual time. If the speed of the father is 35 kmph, find the speed of the son
1) 4
2) 5
3) 6
4) 7
there are 4 machine and it is known that two of them are faulty . they are tested , one by one ,in a random order till both the faulty machine are identified. then the probability that only two test are needed is 1. 1/3 2.1/4 3. 1/2 4. 1/6
there are 4 machine and it is known that two of them are faulty . they are tested , one by one ,in a random order till both the faulty machine are identified. then the probability that only two test are needed is 1. 1/3 2.1/4 3. 1/2 4. 1/6