NUMBER SYSTEM MCQ SET 4
1. Find the unit digit of (123456789)^123456789!ย
(a) 2
(b) 6
(c) 1
(d) 9
Answer: C
2. Find the unit digit of 973^234! x 234^973!
(a) 2
(b) 6
(c) 7
(d) 9
Answer: B
3. Find the unit digit of the expression :
2222^2222 + (4444)^4444 + (888)^8888 + (9999)^9999
(a) 0
(b) 2
(c) 5
(d) 9
Answer: D
4. Find the unit digit of the expression :
1! + 2! + 3! + 4! + ……… 100! .
(a) 1
(b) 0
(c) 3
(d) 5
Answer: C
5. The last digit of the following expression is :
(1)^1 + (2)^2 + (3)^3 + (4)^4 + ……. (10)^10
(a) 0
(b) 5
(c) 7
(d) 9
Answer: C
6. The right most non – zero digits of the number 30^2720 is:
(a) 1
(b) 3
(c) 7
(d) 9
Answer: A
7. Which of the following can’t be the unit’s digit of a perfect square?
(a) 4
(b) 8
(c) 9
(d) 6
ย Answer: B
8. The unit digit of (137^13)^47 is:
(a) 1
(b) 3
(c) 5
(d) 7
Answer: B
9. If the unit digit of 433* 456* 43N is (N + 2) , then what is the value of N?
(a) 1
(b) 3
(c) 8
(d) 6
Answer: D
10. The last digit of the expression
4^1 + 9^2 + 4^3 + 9^4 + 4^5 + 9^6 + …….. 4^99 + 9^100
(a) 4
(b) 6
(c) 5
(d) 0
Answer: D
Leave a Reply