kapil_leo

It should be 9 , 441 = 21*21=3^2*7^2 (2+1)*(2+1) = 9 I would like to add one point , whenever we have to find the factors of a given number first break the number in to product of distinct prime numbers and then just add 1 to the respective powers of prime no's and multiply.It will give the number of possible factors. Rgds, Kapil

It should be 'E'

Good Catch -- don't always assume integers unless specified

Yes it should be 'D' 1. since A is faster than B and A and B together takes half time that of C's => B is slower than C. 2. Its straight forward that C is faster than B

Yes it will be B ... N has to be 6 as its greater than 5 and less than 7 ...

Try to match the coefficients of 7,5 and 11 , start with 11 you will get ans A.

Hi ... Gud Explanation :-) ... 1 typo error ... it will be 90% ... keep posting

Its E

Hi, Since the question says between 4000 and 7000 we have to exclude these numbers more over since both 4000 and 7000 doesn't satisfy the condition of even numbers with all different digit they are not going to affect the correct answer. The approach of fixing the first digit and last digit and checking how many digits can be used for 10'th and hundredths place is logical. Regards, Kapil

Nice Explanation :notworthy

Only 1 satisfies , for 3 SD deviation will be same if all the terms are -ve or +ve as mentioned by kundan. Nice explanation kundan.

Hi I agree with Jakir explanation , since the lines are perpendicular product of there slopes has to be -1. Slope of line L = -1/(p-2) => Slope of line m should be (p-2) Equation in line has slope (p-2). Rgds, Kapil

It should be "D" If we can cultivate the tree it will never extinct.

"B" - if the school has funds for non essential expenditures means it also has funds for essential expenditures there by it can still make more cuts in non essential expenditures.

1. A --- Assumption of total population of lobsters to be constant is made.

Its B , defines advantage of non hierarchical system.

AAC has to be less than 200 as its a sum of 2 2 digit nos , that means A has to be 1. so AAB = 11B , now AB+BA is always a multiple of 11 so B has to be 0.

Gud One ...

Hi Jakir, The angle subtended at the center is same for arc as well as the triangle formed with radius and chord connecting the arc end points. Rgds

Rishikha Gud catch :-) , your solution is correct i missed the point that 10 KG boxes have to be constant ...

See Rishikha's solution

You have to add all families having only 1 TV SET , currently you are thinking about only one kind of TV SET i.e DIGITAL.

Hi, It should be 30 , let x+y+z denotes families having 2 TV sets 120=90+70+50-20-(x+y+z) => people wid 2 TV Sets = 70 => people wid 1 TV = 120 - ( people wid 2 ) - (people wid 3 ) => 120-70-20 = 30 Rgds, Kapil

Hi, You have made 2 mistakes , first one in Q2 and second one in Q4. Q2 Explanation : Price of x calculators = 300 price of one calculator = 300/x revenue = 300 + 120 =420 also , (x-2)(p+5)=420 put p=300/x and solve x comes out to be 30 Q4 Explanation : Since 3/4th of the circle covers the tunnel , the horizontal part subtends 90 degree at the center with say Radius r because it cover 1/4 of the circle ( 1/4*360=90 ) we can apply Pythagoras theorem with 2 sides equal to radius r and one side 12 : r^2 + r^2 =12^2 2r^2=144 r=6*sqrt(2) It implies 3/4th of circumference = 3/4*2*PI*6*sqrt(2) = 9*SQRT(2)*PI Regards, Kapil

Hi, You made a mistake in : 18 = S/30 or S = 480 It should be S=540 which brings the answer to 12 , Unfortunately 12 is not in the ans choice. Explanation : Avg is 18 means we have 6 10KG box and 24 20KG box (6*10 + 24*20)/30=18 For avg to be 14 we need to have 18 10KG and 12 20KG box (18*10 + 12*20)/30 = 14 Enjoy