Number System MCQ Set 3
NUMBER SYSTEM MCQ SET 3
1. The unit digit in the product
7^71 x 6^63 x 3^65 is :
(a) 1
(b) 2
(c) 3
(d) 4
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Answer: D
2. What is the unit digit of
[4523^1632 x 2224^1632 x 3225^1632]
(a) 1
(b) 0
(c) 4
(d) 5
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Answer: B
3. The last digit (1001)^2008 + 1002 is :
(a) 0
(b) 3
(c) 4
(d) 6
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Answer: B
4. Find the last digit of the expression
1^2 + 2^2 + …………. + 32^2 + 33^2 .
(a) 0
(b) 5
(c) 7
(d) 9
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Answer: D
5. Find the unit digit of
1^1 + 2^2 + 3^3 + 4^4 + 5^5 +6^6 + 7^7 + 8^8 + 9^9 + 10^10 .
(a) 0
(b) 5
(c) 7
(d) 9
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Answer: C
6. Find the unit digit of (123456789)^123456789 .
(a) 2
(b) 6
(c) 1
(d) 9
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Answer: D
7. Find the unit digit of 37^39^41 .
(a) 7
(b) 9
(c) 3
(d) 1
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Answer: C
8. Find the unit digit of 9^23^32 .
(a) 9
(b) 1
(c) 3
(d) 4
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Answer: A
9. Find the unit digit of 4^29^30 – 4^30^29
(a) 2
(b) 8
(c) 4
(d) 6
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Answer: B
10. Find the unit digit of 2^23^24 – 9^24^23 .
(a) 8
(b) 1
(c) 4
(d) 6
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Answer: B