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Posted inUPSC CSAT

A 3-digit number ABC, on multiplication with D gives 37DD where A, B, C and D are different non-zero digits. What is the value of A + B + C ?

Posted by By admin February 15, 2025
(UPSC CSAT - 2023) 18 16 15 Can’t be determined due to insufficient data. Solution:…
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Posted inUPSC CSAT

Consider the following in respect of prime number p and composite number c.

Posted by By admin February 15, 2025
1.  (p + c)/(p - c) can be even. 2.  2p + c  can be odd.…
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Posted inUPSC CSAT

Three of the five positive integers p, q, r, s, t are even and two of them are odd (not necessarily in order). Consider the following:

Posted by By admin February 15, 2025
1. p + q + r – s – t  is definitely even. 2. 2p…
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