Number System - Questions & Discussions

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Post 6486375285653504
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shubham_prasad
@shubham_prasad  ·  55 karma

@shubham_prasad Ans fo QNo 25 is 1. You can click on the link for the detailed solution.[img] https://i.imgur.com/Tjo3Qvb.jpg[/img]

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Simi4
@Simi4  ·  6 karma

Thanks

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last non zero digit of 40 factorial

1
2
8
none of these
1 comment28 answers
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Q 33 please with the procedure.

Post 6545455454879744
2 comments
charitha_1
@charitha_1  ·  0 karma

Sum of all the digits is divisible by 9.

(7*5)+(8+9+1+1+1)*10+1+2=738.

It is divisible by 9 leaving remainder zero.

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Subhas_Nandy
@Subhas_Nandy  ·  0 karma

I am getting 3 as the answer. Summation from 75 to 79 = 35 + (7*5). From 80 to 89 = (1+2+..,+9)+(8*10) = 45+80. Similarly, for 90 to 99 = (1+2+...+9)+(9*10). For 100 to 109 = (1+2+...+9)+(1*10). For 110 to 120, it is (10+11+12+...+20)+(1*11). The total sum when divided by 9 leaves a remainder 3.

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Which is best portal to enhance your vocab ? 

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ChahatKapoor
@ChahatKapoor  ·  144 karma

@pratiksahoo33 I hate reading newspapers. and no time for novels. That is the issue. !

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yashchawla
@yashchawla  ·  532 karma

learn roots ..they really help in judging the meaning

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 Which Take home simcats are the toughest? I am finding the earlier ones(101 to 108) pretty easy.. 

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Please provide a possible solution for it . Thanks in advance

Post 6152571795275776
1 comment
Amarrajput17
@Amarrajput17  ·  2 karma

use options 

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The number of factors of N=2^3 x 3^5 x 5^7 which have more than four factors, is?

Solution please!

180
179
182
183
1 comment32 answers
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Product of factors of a number is 576^2. Find the sum of the factors of the number

Solution? 

60
24
7
100
1 like14 answers
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5^8 & 8^5 , which one is greater nd how

2 comments
mayur_arora
@mayur_aroraIIM Bangalore  ·  9,273 karma

@grawat 5^8 & 8^5

=  5^8 & 2^15 

= 8log5 & 15log2

= 8*0.7 & 15*0.3

= 5.6 & 4.5

Compare for these two.


Hence 5^8 is greater.

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zippysoul
@zippysoul  ·  1,238 karma

@grawat remember this handy rule: in between a^b and b^a, the one with the higher exponent is greater (for a, b>3)

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Approach for 9 please

Post 5832125027713024
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tothepoint
@tothepoint  ·  0 karma

732 (base) is multiple of 3. If it is raised to 732 powers, it will be multiple of 3^732. 27 is 3 power of 3, hence original number will be divisible by 27.

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shubham_prasad
@shubham_prasad  ·  55 karma

Remainder would be 0. Please find the solution.    [img]https://i.imgur.com/Ppnu4iY.jpg[/img]

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