<prompt> Je, ni kizidishio kipi cha kawaida zaidi kati ya 3, 4, 6 na 15?  <response>: Njia moja ya kufanya hivyo ni kuorodhesha kuzidisha kwa kila nambari hadi nipate ya kawaida. Msururu wa 3 ni 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, nk. 4 ni 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, n.k. Misururu ya 6 ni 6, 12, 18, 24, 30, 36 , 42, 48, 54, 60, n.k. Vizidishi vya 15 ni 15, 30, 45, 60, n.k. Ninaweza kuona kwamba kizidishio cha kwanza kinachoonekana katika orodha zote nne ni 60. Kwa hivyo, 60 ndio kizidishio kisichojulikana sana. ya 3, 4, 6 na 15. 