Recent puzzles under tag algebra

+1 vote

Calculate without substitution 1 + a + 2b + 3c + 2ab + 3ac + 6bc + 6abc if a=999, b=666 and c=333

posted Oct 10, 2015 by anonymous

+1 vote

If x^4 + 5y = 6 x^2 y^2 + 5x = 6 then x,y=??

posted Oct 6, 2015 by anonymous

+1 vote

In a class consisting of 100 students 20 know English and 20 do not know Hindi and 10 know neither English nor Hindi...

posted Oct 6, 2015 by anonymous

0 votes

The sum of 3 single digit numbers is 15 less than their product . If we subtract 2 from first given number then...

posted Sep 17, 2015 by anonymous

+1 vote

If the sum of two numbers is 11, and the sum of their squares is 99, find the sum of their cubes.

posted Sep 3, 2015 by Upma

0 votes

If 4^x=.5 then x=??

posted Aug 22, 2015 by anonymous

+1 vote

If 2^x = 1/2^y then x+y=??

posted Aug 17, 2015 by anonymous

0 votes

Which is greater 70^71 or 71^70?

posted Aug 16, 2015 by anonymous

+1 vote

There is a 3 digit positive number such that sum of all its digits is equal to 6. How many such number are possible?

posted Aug 13, 2015 by anonymous

0 votes

If x + 1/x = 5 then x^2 + 1/x^2 = ??

posted Aug 7, 2015 by anonymous

+1 vote

Solve algebra rebus ?

posted Aug 5, 2015 by Rajni

0 votes

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of following: 21 Q 7 R 9 S 10 P 13

posted Aug 3, 2015 by Madhavi Latha

+1 vote

Is 7^103 + 6^103 divisible by 13 if yes then why if no then why not??

posted Jul 29, 2015 by anonymous

+1 vote

My ones is one more than my tens. My tens digit is 0. My hundred is 4 more than my ones. What number am I?

posted Jul 23, 2015 by Melchor Aquino Gasmen

0 votes

If (9802 + 9803 + 9804 + .... + 9999 + 10000 = A^3 + (A+1)^3) then what is the value of A?

posted Jul 19, 2015 by anonymous

0 votes

How many elements of the set {1!, 2!, 3!, ....2015!} are even numbers?

posted Jul 13, 2015 by Salil Agrawal

+1 vote

How many elements of the set {1!, 2!, 3!, ....2015!} are perfect squares?

posted Jul 13, 2015 by anonymous

0 votes

If a and b are real numbers that satisfy the equation below, what is the value of a and b respectively?

posted Jul 9, 2015 by anonymous

0 votes

If x + y = 7 and x^3 + y^3 = 133 then xy=??

posted Jun 17, 2015 by anonymous

+2 votes

If 1/x + 1/y = 1/3; 1/x + 1/z = 1/5; 1/y + 1/z = 1/7 then x/y = ??

posted Jun 13, 2015 by anonymous

+1 vote

If abcde=1; and a,b,c,d and e are all positive real numbers then what is the minimum value of a+b+c+d+e?

posted Jun 7, 2015 by anonymous

+1 vote

Find the number of Onto functions ?

posted Jun 5, 2015 by Ankit Kamboj

0 votes

The function f (x) = | x - 2 | + | 2.5 - x| + |3.6 -x|, where x is a real number, attains a minimum at ??

posted Jun 1, 2015 by Ankit Kamboj

0 votes

If half of sqrt(2) is sqrt(K) then what is the value of K?

posted May 31, 2015 by anonymous

–3 votes

If x = 29y+7 and x-y is divisible by 5, then what is the possible value of y where x and y both are integers?

posted May 29, 2015 by Atif

0 votes

An arithmetic sequence formed of 11 terms, and the sum of all its terms equals to 220. Find the middle term?

posted May 27, 2015 by anonymous

–1 vote

which three odd numbers will sum up to 30

posted May 24, 2015 by Baadu Daniel

0 votes

What is the reminder when 2^123456789 is divided by 7?

posted May 20, 2015 by Harshita Dhaliwal

0 votes

How many integer values of x and y are there such that 4x + 7y= 3 , while |x|<500 and |y|<500 ?

posted May 19, 2015 by Ankit Kamboj

+2 votes

If 31x + 30y + 29z =366 , find x+y+z ? (x,y,z are natural numbers)

posted May 13, 2015 by Ankit Kamboj

0 votes

If f(x)= 25^x / ( 25^x + 5 ) then find f(1/99) + f(2/99) + f(3/99) ..... + f(98/99)?

posted May 12, 2015 by Ankit Kamboj

+1 vote

If 6xy + 10x +15y = 39 then find the minimum value of 2x+3y (x, y are positive and real)?

posted May 12, 2015 by Ankit Kamboj

+1 vote

Guess me : ENEMY = 2 * LINK LINK + 2 = HELL Then what will be TAXI + HELL?

posted May 5, 2015 by Divya Bharti

+2 votes

What will be sum of x and y if x,y are part of series 4, 16, 7, 49, 13, 169, x, y

posted Apr 28, 2015 by anonymous

+1 vote

If x+y+z = 7, 2x-y+z = 4 Then 11y-10x = ??

posted Apr 24, 2015 by anonymous

+2 votes

If 1/x + y/2 = z/3 + 4/k then what woud be minimum integral value of k for integral value of x, y and z.

posted Apr 1, 2015 by anonymous

+1 vote

7 multiple of a two digit number is a perfect square. What will be the Sum of all such possible two digit numbers?

posted Mar 29, 2015 by Salil Agrawal

+2 votes

How many ways are there to pick 2 squares of different colors?

posted Mar 28, 2015 by anonymous

+1 vote

What should be man's speed for rest of the motion, completing 100 kms from A to B upto 9 AM.

posted Mar 26, 2015 by anonymous

+1 vote

x, y, z are 3 nonzero positive int such that x+y+z = 8 and xy+yz+zx = 20, then what will be minimum value of x*y^2*z^2

posted Mar 20, 2015 by anonymous

+1 vote

If 16% of x = y% of 18, then what would be the ratio of Sqrt(x) and 2y

posted Mar 19, 2015 by Ujjwal Mehra

+1 vote

Arithmetic mean of two numbers whose sum is equal to 28...

posted Mar 18, 2015 by anonymous

–1 vote

What is the value of x which satisfies the following equation?

posted Mar 14, 2015 by Tapesh Kulkarni

–1 vote

Boy 1.4m tall casts a shadow 1.2m long at a time when building casts a shadow 5.4m long. What is height of building?

posted Mar 12, 2015 by Tapesh Kulkarni

+1 vote

17% of 17 + 18% of 18 = 19% of x then x is lying in the range

posted Mar 6, 2015 by anonymous

+1 vote

If k, k^2 and (2k+1) are in arithmetic progression then possible value of k-(1/2k) is?

posted Mar 4, 2015 by Ankur Athari

0 votes

Find the value of a+b+c+d: if a,b,c,d are positive numbers of algebraic sequence....

posted Feb 18, 2015 by anonymous

–1 vote

Given that x^2 - 4x + 8 = 0, find the value(s) of x?

posted Jan 30, 2015 by anonymous

+2 votes

If x (x^2+6x+18)(x+6) = 159919 then what would be (x+4)^4

posted Jan 15, 2015 by anonymous

+1 vote

Find the value of A+B if A*(4+(B/100))=108.81

posted Jan 2, 2015 by anonymous