OG12 PS142

Fadaways

If y is the smallest positive integer such that 3,150 multiplied by y is the square of an integer, then y must be
A 2
B 5
C 6
D 7
E 14
题目没太看懂~！

daoyinger

3,150=315*10=63*5*2*5=7*(3^2)*(5^2)*2
y是最小的正整数，使得3,150除以y后是某个整数的平方；
y=14, 3,150/14=15^2

卮言浅夏

明明是乘以指的是3154乘以Y是个数的平方。