Bunuel wrote:
89renegade wrote:
Bunuel wrote:
Official Solution:
Statement (1) by itself is insufficient. Consider\(Z = 230\) (the answer is 3) and\(Z = 229\) (the answer is 2).
Statement (2) by itself is insufficient. Consider\(Z = 236\) (the answer is 3) and\(Z = 226\) (the answer is 2). However, S2 gives that the units digit of\(Z\) is 6.
Statements (1) and (2) combined are sufficient. If the units digit of\(Z\) is 6 (i.e. not 0), the tens digit of\(Z - 91\) is 1 bigger than the units digit of\(Z\) . The answer is 2.
Answer:
Statement (1) by itself is insufficient. Consider\(Z = 230\) (the answer is 3) and\(Z = 229\) (the answer is 2).
Statement (2) by itself is insufficient. Consider\(Z = 236\) (the answer is 3) and\(Z = 226\) (the answer is 2). However, S2 gives that the units digit of\(Z\) is 6.
Statements (1) and (2) combined are sufficient. If the units digit of\(Z\) is 6 (i.e. not 0), the tens digit of\(Z - 91\) is 1 bigger than the units digit of\(Z\) . The answer is 2.
Answer:
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