3. M=O+P+Q, where O, P, and Q are consecutive positive integer;
M=R*S*T, where R, S and T are positive consecutive integers. What is the remainder when M is divided by 5?
1). When O is divided by 5, the remainder is 1
2). When R is divided by 5, the remainder is 1
1) means that O= 1, 6, 11, 16 etc.
which means that O+P+Q = 1+2+3 (this type always ends with digit 6) or 6+7+8 (always ends with digit 1)
SUFFICIENT to conclude that remainder for M is 1 when divided by 5
2) means that R= 1,6,11,16 etc
R*S*T=1*2*3=6
6*7*8=336
11*12*13=1576
always ends with 6
SUFFICIENT to conlude the remainder for M when divided by 5
Answer is D