which is best book to increase speed in mathematics...
If x and y are positive integers ,what will be the sum of co-efficient of expansion of expression(x+y)^44=?
If M lies between (-7) and 13, then find the greatest value of (13-M)^7(M+7)^5
- 2^103^37^7
- 3^10*2^14
- 13^7*7^3
- 3^1013^37^7
- 2^1013^37^7
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Find remainder when (33^34^35) is divided by 7...plse tell complete approach..
find the remainder wen 30^72^87 is divided by 11.
I found this explanation .. can sum1 tell me how he got 8^8 while solving
explanation-30^72^87 mod 11 = 8^72^87 mod 11.now as by euler theorem... 8^10 mod 11= 1
so 8^72^87 can be written as {(8^10)^some number } x 8^8
so[ {(8^10)^some number } x 8^8 ] mod 11=8^8 mod 118^8 mod 11 =(-3)^8 mod 11= (81)^2 mod 11=4^2 mod 11=16 mod 11= 5
hence the remainder is coming out to b 5.
Progressions LOD 2 questions 31 and 32 plz
pls solve these
1) Find the sum of all possible whole number divisors of 720
a)2012,b)2624,c)2210,d)2418
ans - d
2) if 3 positive real nums x,y,z are in AP such that xyz=4, then what will be min value of y?
a)2^(1/3),b)2^(2/3),c)2^(1/4),d)2^(3/4)
ans - b
thanx..
If M lies between (-7) and 13, then find the greatest value of (13-M)^7(M+7)^5
1) 13^7*7^3
2) 3^10*13^3*7^7
3) 2^10*13^3*7^7
4) 2^10*3^3*7^7
5) 3^10*2^14 Skip
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hey puys...see this question in page number 538 of latest edition...problem 17.46..a mixed doubles tennis game is to be played between two teams(each team consists of one male and one female).there are four married couples.no team is to consist of a husband and wife.what is the maximum number of games that can be played?... can u please solve and explain dis to me...
There were 42 students in a hostel.Due to the admission of 13 new students,the expenses of the mess increased by Rs.31 per day while the average expenditure per head diminished by Rs 3.what was the original expenditure of the mess?
a)Rs 633.23 b)Rs 583.3 c)Rs 623.3 d)Rs 632
Plz explain someone..
A team of miners planned to mine 1800 tones of ore during a certain number of days .Due to technical difficulties in one third of the planned number of days,the team was able to achieve an output of 20 tones of ore less than the planned output.To make up for this,the team overachieved for the rest of the days by 20 tones.The end result was that the team completed the task one day ahead of time.How many tonnes of ore did the team initially plan to ore per day?
a)50tons b)100tones c)150 tones d)200tons e)250 tones
Can anyone plzz suggest a short approach to do this sum..I did with x ...its getting to a long quadratic equation
A dealt some cards to B and himself from a full pack of playing cards and laid the rest aside.
A then said to B, " If you give me certain no. of cards, i will have four times as many cards you will have. If i give u the same no. of cards, i will have thrice as many cards as you will have."
Of the given choices, which could represent the nin. no. of cards with A?
a). 9
a). 9
b). 31
c). 12
d). 35
What is the remainder when 128^1000 is divided by 153?
a)103 b)145 c)118 d)52
plz explain the procedure someone..
The sum of the series :1/2+1/6+1/12+1/20+......1/156+1/182 is?
a)12/13 b)13/14 c)14/13 d)none
For the above question what is the sum of the series if taken to infinite terms?
a)1.1 b)1 c)14/13 d)none
Plz explain the procedure if anyone can do these
The sum of the first 4 terms of an AP is 28 n the sum of the 1st 8 terms of the same AP is 88.Find the sum of the first 16 terms of the AP?
a)346 b)340 c)304 d)268 e)none
explain plz
How many 3 digit nos have the property that their digits taken from left to right form an AP or a GP?
a)15 b)18 c)20 d)none
plz explain the procedure
Mr Jagmohan calculated the average of 10 three digit numbers.But due to mistake he reversed the digits of a number and thus his average increased by 29.7.The difference between the ubits digit and hundreds digit of that no is:
a)4 b)3 c)2 d)cant be determined
Ans is (b)
Can ny1 plz explain how to do the sum?
Hi Puys... need small guidance for solving Arun sharma. 10 days back only I started this book. I heard that if we do only LOD 1 that is sufficient. I did number system but LOD1 was very easy not upto CAT level. Please suggest me approach for this book. 
puys,
plz help me out wid dis question,n more importantly the thought process and approach :-
at a particular time there were 7 bowlers in indian cricket team's list of 16 players shortlisted . statisticians discovered that if you looked at the number of wickets taken by any of the 7 bowlers,the number of wickets taken by them had a strange property. the numbers were such that for any team selection of 11 players (having 1 to 7 bowlers) by using the number of wickets taken by each bowler and attaching coefficients of +1,0 or -1 to each value available and adding the resultant values,any number from 1 tp 1093, both included could be formed. if we denote W1,W2,W3,W4,W5,W6 and W7 as the 7 values in the ascending order what would be the value of W1+2*W2+3*W3+4*W4+5*W5+6*W6 ??
a) 2005
b)1995
c)1985
d)none
plz answer with explaination..