a+1/b =7/3
b+1/c = 4
c+1/a = 1
find abc
|x-10|+|x-20|+|x-30|+|x-40|=178
integral soltions???
(1+x+x^5)^10
no. of terms in its expansion?
numbers are written starting from 1,2,3,4,5 and so on>
if 1 number is erased>new average=40(11/16)>>>
find the erased number?
There are “n” necklaces in a safe box (n>1). Every necklace has the same number of diamonds. Each necklace has at least 2 diamonds. The total number of diamonds in these “n” necklaces is between 500 and 600. If this data is sufficient to find the value of n, then what is the value of “n”?
a 19
b 23
c 29
d None of these
coeff of x7 in (1-x2 + x3)(1+x)^10
coeff of a^3 *b^2 *c^3 in the expansion of (a + 2b + 3c)^8 ?
There are exactly n families - F1, F2....Fn - Staying with Mr. Chari's neighbourhood. The Number of members is the family Fn = n+1. Mr. Chari decided to invite at most one member from each family for his birthday party. If the total number of ways in which he can invite of one or more members from his neighbourhood is 2519, find n.
Easy !
2^29 is a known number which has all distinct digits and it is a 9 digit number. So, there must be a missing digit in it. Determine that digit.
XAT 2013 question..strategy?
Good question !
Three friends, Raghu, Amit and Ninad are cycling around a circular track of length 1.2 km at different speeds. They start from the same place at the same time and Raghu and Amit reverse their directions every time they meet. Raghu meets Amit and Ninad for the first time after 40 seconds and 56 seconds respectively while Amit and Ninad meet for the first time after 30 seconds.
What is the ratio of speeds of Raghu, Ninad and Amit?
Three circles with radii 1 unit touch each other externally while a bigger circle encloses all 3. A smaller circle is drawn in the area enclosed by the 3 circles,concentric with bigger circle such that it touches all the 3 circles. The ratio of the radius of smallest circle to that of the biggest circle is :
A. 1/(4 - 2(3)^1/2 ) B. 1/( 2+(3)^1/2) C. 1/(7+ 4(3)^1/2 ) D. 1/(3+ (3)^1/2)
pls give explanation
i dont know why m not getn ansr,,,,,,,,
ABC is a triangle given that angle B is equal to 2x and angle C is equal to x. AD is the angle bisector of angle A on line BC.Given that side AB=DC find angle BAC.
1) 36 2) 72 3) 144 4) none😠
ABC is a triangle given that angle B is equal to 2x and angle C is equal to x. AD is the angle bisector of angle A on line BC.Given that side AB=DC find angle BAC.
1) 36 2) 72 3) 144 4) none
ABCD is a square whose area is 'a2' sq. units. ABE is a equilateral triangle as shown in the diagram. Find the area of ∆ AEF?
ye image h:banghead:
The length of a 100 sided polygon are 1,2,3,4......100. A circle of Radius r cm is inscribed in this polygon. What is the area of the polygon ??
The length of a 100 sided polygon are 1,2,3,4......100. A circle of Radius r cm is inscribed in this polygon. What is the area of the polygon ??
Rohan writes all three-digit numbers of base 6, one below the other in an order. Find the number of times the digit '1' is used by Rohan.
😃