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26 May 2019, 23:21
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If x is a positive integer, what is the digit at the units place in the expansion of x^40?
(1) x is even
(2) x is not a multiple of five
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
(1) x is even
(2) x is not a multiple of five
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
27 May 2019, 00:03
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GMATMBA5
If x is a positive integer, what is the digit at the units place in the expansion of x^40?
(1) x is even
(2) x is not a multiple of five
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
(1) x is even
(2) x is not a multiple of five
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Statement 1. x= 20 and 25 will have different unit digits. Insufficient.
Statement 2. 12 and 13 will have different unit digits. Insufficient.
1+2, x must be ending with 2/4/6/8 for all these 4 possibilities of x the last digit in the for the format x^4n is 6. Sufficient C
Last Digit
2^4-6
4^4-6
6^4-6
8^4-6
Mo2men
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27 May 2019, 00:23
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LeoN88
GMATMBA5
If x is a positive integer, what is the digit at the units place in the expansion of x^40?
(1) x is even
(2) x is not a multiple of five
(1) x is even
(2) x is not a multiple of five
Statement 1. x= 20 and25 will have different unit digits. Insufficient.
Statement 2. 12 and 13 will have different unit digits. Insufficient.
1+2, x must be ending with 2/4/6/8 for all these 4 possibilities of x the last digit in the for the format x^4n is 6. Sufficient C
Last Digit
2^4-6
4^4-6
6^4-6
8^4-6
Hi,
25 is not an even number.
