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Apr 14, 2013

#### Q1 find the least number which must be added to 7900 to obtain a perfect square?Q2 find the least number which must be subtracted from 2509 to make it a perfect square?



first find the square root of 7900.
by prime factorisation method
quotient+i 2=88+1=89...

Sep 18, 2014

#### What is the fullform of CPCT ?



Corresponding parts of Congruent Triangles.

Aug 4, 2013



Dec 8, 2013

#### please suggest a good hindi poem for my hindi recitation competition



Select a poem on humanity and brotherhood .

May 29, 2015

#### Five years ago a man was seven times as old as his son. Five years hence, the father will be three times as old as his son. Find their present ages.



Let the past age of son = x
Let the past age of father = 7x
So,
Present ages are x+5 and 7x+5
Future age of son = x+10
Future age of father = 7x+10

Feb 18, 2015

#### Find the compound interest on Rs 4000 for 2.5 years at 10% per annum.



Principal(P)  = Rs 4000

Ra...

Aug 11, 2013



Jan 5, 2014



Oct 28, 2013

#### Sum of the digits of a 2 digit number is 9 when we interchange the digits it is found that the resulting new number is greater than the orginal nimber by 27 ? what is 2 dear teacher am really confused with these kinda question would you like to help me solve this in a easy way ... hope you willl



Assume the digit in ones place as x and the digit in tens place is y
The original number is (10y + x)
Number obtained by reversing the digits = (10x + y)
Now check for the condition
...