How many 5 digits telephone number can b...

How many 5 digits telephone number can be formed from the digits from 0 to 9 when every number start with 23 (no digit being repeated in any number)

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 4-EXERCISE

If (1 + i) (2 +i) (3 + i)…..(n+i)=a+ib ,show that 2.5.10….(n^2+1)=a^2+...
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Find the value of 3^2/3. 3^2/9. 3^2/27…..
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If the gradiant of the line joining the points (2a, -2) and (1, -a)...
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Find the condition for the existance of lim(xrarr0)f(x)
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Find the variance of 1, 2, 3, 4.
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There are four letters and four envelops with proper address. Find the...
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For any three sets A, B, C. prove that A xx (B cup C)=" (A xx B) cup(A...
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Prove by mathematical induction.1/1.3+1/3.5+1/5.7+....+1/((2n-1)(2n+1)...
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How many different arragements of the letters of the word ALGEBRA can ...
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If the sum of the n term of an AP is n^2 + 2n . which, term will ...
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If z=x+iy and (z-i)/(z+1)is purely imaginary,then show that the point ...
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The equation of the two adjacent sides of a parallelogram are 4x+ 5y =...
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In a rectangle, the co-ordinates of the end point of a diagonal are (2...
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If the straight line dx + cy = cd is perpendicular the line joining th...
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