UKPSC PCS 2012 · Question 32 of 78
Quant
357 = 21 x 17 and n = 17k+5; 39 = 5 + 17x2 is the only listed value of that form.
Source: UKPSC 2012 Prelims CSAT Paper-II (adda247/studyfry PDF), exam held 30 Nov 2014
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