What will be the next number in the series 766, 656, 546, ...?

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What will be the next number in the series 766, 656, 546, ...?

A446

B436

C456

D426

Nithin K ? Thu Sep 29 2016 12:30:00 GMT+0530 (IST)

Answer is 436

In given series

766, 656, 546,...

---

First digit of number is decresed by 1,

So First digit of next number should be 4

7_ _ ,6 _ _, 5 _ _, 4 _ _ 

---

Second digit of number is decresed by 1,

So Second digit of next number should be 3

7 6 _ ,6 5 _, 5 4 _, 4  3 _ 

---

Third digit remained same

766, 656, 546, 436

So Answer is 436

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21.025 divided by 0.025 = ?

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A1.01

B1001

C10.1

D101

Nithin K ? Thu Sep 29 2016 12:30:00 GMT+0530 (IST)

Answer is : 1001

\(\frac{25.025 }{0.025} = \frac{25 +0.025 }{0.025} \)

\(= \frac{25}{0.025} + \frac{0.025}{0.025} \)

\(=\frac{25000}{25} + 1\)

=1000+1

=1001

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sqrt 0.0081

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A0.09

B0.9

C0.91

D0.009

Nithin K ? Thu Sep 29 2016 12:30:00 GMT+0530 (IST)

Answer is : 0.09

\(\sqrt{0.0081} = \sqrt{81 \over 10000} \)

\(=\sqrt{9^2 \over 100^2} \)

\(=\frac{9}{100} \)

\(=0.09\)

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If 12 men or 18 women can do a work in 14 days, then in how

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If 12 men or 18 women can do a work in 14 days, then in how many days will 8 men and 16 women do the same work?

A12 days

B10 days

C14 days

D9 days

Nithin K ? Wed Sep 28 2016 12:30:00 GMT+0530 (IST)

Let the required number of days be x. 
12 men = 18 women 
8 men =   \(\frac{18}{12} \times 8\)   Women =  \(\frac{144}{12} => 12\)  Women.  
(8 men and 16 women) =   (12 +16)=>28 Women   
Now, More women, Less days (Indirect Proportion)

\(28:18 ::14:x\)

\(28 \times x = 18 \times 14\)

\(28 \times x = 252\)

x = \(\frac{252}{28}\)

x=9

 

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A two digit number is five times the sum of its digits. If 9

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A two digit number is five times the sum of its digits. If 9 is added to the number, the digits interchange. Find the sum of the digits.

A11

B7

C6

D9

quiaz ? Dec 20 '2018 at 14:16

Let a and b the digits we can write the number as "ab" but the number is \(10 \times a+b\)
(for example if a=3 and b=2 the number would be 32 and \(32 =10 \times 3+2\)) 

a two digit number is 5 times the sum of its digit then \(10 \times a+b=5(a+b)\)
when 9 is added to the number the result is the original number with its reversed \(10 \times a+b+9=10 \times b+a \)
then we have the following equations: 
\(10 \times a+b=5(a+b)\)
\(10 \times a+b+9=10 \times b+a \)
then 
\(10a+b=5a+5b\)
\(10a+b+9=10b+a \)
then 
\(5a-4b=0\)

 
\(9a-9b=-9 \)
then 
\(5a-4b=0\)
\(a-b=-1\)
then using 2nd eq a=b-1 
using 1st eq \(5(b-1)-4b=0 \)
then \(5b-5-4b=0\)
then b=5 and a=5-1=4 
the sum of digits is 9.

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A sold a watch to B at the gain of 20% and B sold it to C at

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A sold a watch to B at the gain of 20% and B sold it to C at a loss of 10%. If C bought the watch for Rs.216, at what price had A bought the watch?

ARs.216

BRs.100

CRs.250

DRs.200

Nithin K ? Sun Sep 25 2016 12:30:00 GMT+0530 (IST)

Consider A purchased watch for Rs.x

Then, \(x \times \frac{120}{100}\times\frac{90}{100} =216\)

108x =21600

x = 200

\(\therefore\) A bought the watch for 200 Rs

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The area of a circle is 1386 m^2. Find its circumference.

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The area of a circle is 1386 m^2. Find its circumference.

A444 m

B70 m

C132 m

D19 m

Nithin K ? Sun Sep 25 2016 12:30:00 GMT+0530 (IST)

Given area of circular field is 1386 m2
But area of circle = πr²
∴ πr² = 1386
r² = \(1386 \times 7 \over 22 \)

r²= 441 m

r = \(\sqrt{441} \)m
∴  r = 21 m
Circumference of the field = 2πr = 2 x \(22 \over 7\)x 21 = 132m.

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