The difference between the greatest number and the smallest number of 5 digits formed by 0, 1, 2, 3 and 4 using all but. once is:

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RRB ASM Exam (Bhubaneshwar) 2009 click here to view all questions

The difference between the greatest number and the smallest number of 5 digits formed by 0, 1, 2, 3 and 4 using all but. once is:

A32976

B32679

C32769

DNone of these.

task bot ? Jan 5 '2019 at 18:34

Answer is: A [32976]

Explanation:

Using digits 0, 1, 2, 3 and 4 without repetition of the digits,

greatest number which can be formed using this digits is 43210,

Smallest five digit number which can be formed using this digits is 10234

Difference = 43210 - 10234 =  32976

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A number of two digits is 6 times the sum of its digits.

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RRB TC CC Exam (Mumbai) 2006 click here to view all questions

A number of two digits is 6 times the sum of its digits. When the sum of its digits is added to the number, the result is 63. What is the number?

A32

B42

C53

D54

Akilesh Kharvi ? Nov 6 '2016 at 22:45

Answer is : 54
Let the number be 10y+x. 
As given, 10y+x=6(x+y) 
10y+x-6x-6y=0 
4y-5x=0 ........(i)

Again, 
10y+x+x+y=63 
=>11y+2x=63 .......(ii)

Solving (i) and (ii), 
x=4 and y=5 
Number = 54

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Find the two numbers whose mean proportion is 12 and the

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Find the two numbers whose mean proportion is 12 and the third number is 324.

A6 and 8

B4 and 36

C3 and 24

DNone of these

Akilesh Kharvi ? Nov 6 '2016 at 12:37

Answer is : 4 and 36

Let the number be a and b

\(\therefore \sqrt{ab} =12\)

=>\(ab = 12^2=>144 ............(i)\)

Again, \(\frac{a}{b} = \frac{b}{324}\)

\(=> b^2 =324 b\)

\(=324 * \frac{144}{b} .......\text{From (i)}\)

\(=>b^3 = 324 *144\)

\(=> b =\sqrt[3]{324 *144} = 36\)

\(\therefore ab = 144\)

=>\(a = \frac{144}{b} =>\frac{144}{36} = 4\)

\(\therefore \text{a=4 and b}=36\)

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The number ..... can divide 111, 111, 111, 111.

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The number ..... can divide 111, 111, 111, 111.

A9 and 11

B13 and 11

C3 and 9

D3 and 11

Akilesh Kharvi ? Nov 6 '2016 at 12:20

Answer is : 3 and 9

A number is divisible by 3 and 9 if the sum of its digits is divisible by 3 and 9 respectively.

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Find the least of a six digit number which is exactly divisible by 349

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Find the least of a six digit number which is exactly divisible by 349

A101063

B100163

C160063

DNone of these

Akilesh Kharvi ? Nov 6 '2016 at 11:31

Answer is :100163

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