What is the remainder when 1551*1553*1555*1557*1559 is divided by 10? (GRE Quant)

What is the remainder when 1551*1553*1555*1557*1559 is divided by 10? Answer Options: (A) 0 (B) 2

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If ( X^a x Y^b x Z^c) equals the product of 154 and 56... (GRE Quant)

If ( X^a x Y^b x Z^c) equals the product of 154 and 56, z > y > x, and a > b > c, then what is the value of (a^X x b^Y x

Which is best paper or computer based IELTS?

Can anyone suggest which mode is better to write ielts? Paper or computer? I have good typing speed.. and I'm comfortabl