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Agam answered 1 year(s) , 10 month(s) ago

Least number to be added to make to make it a perfect square

Q1 find the least number which must be added to 7900 to obtain a perfect square?

Solution:

First let us find the square of 7900 using long division method.

The remainder is

...

Apr 14

• 35 Likes
• 142699 Views

Apr 14

Yuvraj answered 1 year(s) , 8 month(s) ago

What is the fullform of CPCT?

Sol:
The full form of CPCT is Corresponding parts of Congruent Triangles.

Sep 18

• 33 Likes
• 125988 Views

Sep 18

please suggest a good poem for my hindi recitation competition

select a poem on world with trees and greenery and compare with world without it. i recited such a poem and got the first prize for it. you can go for it to and make sure you give your best expressions.
...

Dec 8

• 8 Likes
• 46444 Views

Dec 8

In a fraction, twice the numerator is 2 more than the denominator.

Let the numerator be x
Denominator = 2x − 2
Therefore the fraction = x/2x − 2
Given when 3 is added to both the numerator and denominator, the fraction becomes 2/3.

...

Aug 4

• 7 Likes
• 45748 Views

Aug 4

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.

Dear friend,
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...

May 29

• 5 Likes
• 41996 Views

May 29

areas of 3 adjacent faces of a cuboid are x,y,z

Let the sides of the cuboid be a, b and c.
Given x, y and z are areas of three adjacent faces of the cuboid
Hence x=ab,  y=bc, z=ca
(x)(y)(z) = (ab)(bc)(ca)
x

...

Jan 5

• 2 Likes
• 34813 Views

Jan 5

Kishore answered 5 year(s) , 7 month(s) ago

Sum of the digits of a 2 digit number is 9

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...

Oct 28

• 3 Likes
• 34231 Views

Oct 28

Construct a rhombus of diagonals 6.4 and 5.2

Let the given diagonals be AC = 5.2 cm and BD = 6.4 cm
Rough sketch:

Steps of Construction:

• Draw a line segment AC = 5
...

Aug 11

• 2 Likes
• 34228 Views

Aug 11

Raghunath answered 4 year(s) , 3 month(s) ago

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

Principal(P)  = Rs 4000

Rate of Interest(r )  = 10%

Time = 2.5 years

Here first we take n = 2 years.

A = P( 1 + r /100)n  Where  A = Amount  and n = number of

...

Feb 18

• 5 Likes
• 34010 Views

Feb 18

Agam answered 1 year(s) , 10 month(s) ago

1200 soldiers in a fort had enough food for 28 days.

Given that 1200 soldiers in a fort had enough food for 28 days
Let the number of soldiers transferred to another fort be x
After 4 days, number of soldiers = (1200 – x)
Given that food l...

Nov 10

• 6 Likes
• 33275 Views

Nov 10

Rajan Raman answered 4 year(s) , 7 month(s) ago

Find the least perfect square number?

LCM (3, 4, 5, 6 ,8) = 120

120 = 2 x 2 x 2 x 3 x 5.

As 2,3 and 5 are not in pair in LCM’s factor so we need to multiply 120 by 5 and 3,2 to make it a perfect square.
...

Nov 3

• 0 Like
• 32707 Views

Nov 3

Kishore answered 5 year(s) , 11 month(s) ago

a sum of 500 is in the form of denominations of 5 and 10.if the total number of notes is 90 find the number of notes of each denomination.

Let the number of Rs 5 notes be x
Hence the number of Rs 10 notes be (90 − x)
Total sum of money = Rs 500
∴ 5x + 10 (90 − x) = 500
5x + 900 − 10x = 500
− 5x = 500 − 900...

Jul 9

• 5 Likes
• 30457 Views

Jul 9

How to construct a 15 degree angle with a compass?

1. First construct 60° angle
2. Bisect 60° angle to get 30°
3. Lastly again bisect 30° angle to get 15°

Aug 28

• 2 Likes
• 29984 Views

Aug 28

Agam answered 1 year(s) , 7 month(s) ago

Construct a square each of whose diagonals measures 4.8 cm

Steps for Constructions:

• Draw a line segment AC = 4.8 cm length
• Now draw perpendicular bisector of AC. Let it intersect AC at point O.
• With O
...

Jul 30

• 2 Likes
• 29674 Views

Jul 30

Hasan buys two kinds of cloth materials for school uniforms , shirt material

Let the cloth purchased by Hasan for trousers be 2x m
Cloth purchased by Hasan for shirt material be x m
Given price of trouser material at the rate of Rs.80/m = 2x × 80 = 180x...

Aug 3

• 4 Likes
• 28689 Views

Aug 3

Ramesh answered 4 year(s) , 8 month(s) ago

Find the interest and amount.

Sol:
Principal = Rs 4000
Time = 4/3 years
Rate of interest = 2 paise per rupee per month
= 0.02 Rs per rupee per month
= Rs...

Sep 26

• 2 Likes
• 27431 Views

Sep 26

Agam answered 1 year(s) , 8 month(s) ago

Diagonals of a rectangle ABCD intersect in O

∠BOC = ∠AOD� [Vertically opposite angles are equal]
∠AOD = 70°
Since diagonal of a rectangle are equal and they bisect each other.
We can write OA = OB = OC = OD
Hence�DAOD is an...

Jan 3

• 4 Likes
• 26869 Views

Jan 3

Find the number of voters enrolled on the voter list.

Sol:
Percentage of votes polled for winning candidate = 54%
Percentage of votes polled for defeated candidate = 46%
Percentage majority = 54 - 46 = 8%

Let the number of v...

Oct 16

• 0 Like
• 25108 Views

Oct 16

Preet commented 5 year(s) , 11 month(s) ago

Two opposite angles of a parallelogram are( 3x-2)º and (50-x)º

Given two opposite angles of a parallelogram are (3x − 2)º and (50 − x)º
Recall that opposite angles of a parallelogram are equal.
Hence (3x − 2) = (50 − x)
⇒ 3x + x = 50 + 2
⇒ 4...

Jul 18

• 6 Likes
• 23195 Views

Jul 18

Ramesh answered 4 year(s) , 7 month(s) ago

Find the length of the altitude corresponding to the largest side.

Sol:
Sides of the triangle,
a = 20 cm, b = 21 cm, c = 29 cm

S = (a + b + c) / 2
= (20 + 21 + 29) / 2
= 35

Area of the triangle = √[s(s-a)(s-...

Oct 16

• 1 Like
• 22103 Views

Oct 16

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