Question

The H.C.F. of 3150 and a number is 42. Which of the following can be the number?

Answer 1

$2^{2} *3^{2} *5=4*9*5=4*45=180\\2^{2} *3^{2} *5^{2} =4*9*25=36*25=900\\2^{2} *3*7=4*3*7=4*21=84\\2^{2} *3^{2} *7=4*9*7=36*7=252$

$raspunsul, e, B, 900$