<prompt> Ni idadi ngapi za kwanza kuwa na mraba kati ya 4000 na 7000?  <response>: Ili kupata prime whose squares lie between 4000 na 7000, tunaweza kuzingatia integer thamani ya mzizi wa mraba wa namba hizi. yoyote integer n whose square lies between 4000 na 7000 lazima kuridhisha 63 n 84. katika hii mbalimbali, tu prime ni 67, 71, 73, 79 na 83. kwa hiyo, kuna 5 prime na squares kati ya 4000 na 7000. 