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Q11. How many numbers are there in all from 4000 to 4999 (both 4000 and 4999 included) having at least one of their digits repeated?
A. 356
B. 216
C. 496
D. 504
Ans. C
Q12. The number of prime factors of (3 x 5)12 (2 x 7)10 (10)25 is:
A. 47
B. 60
C. 72
D. None of these
Ans. D
Q13. A and B complete a work in 6 days. A alone can do it in 10 days. If both together can do the work in how many days?
A. 3.75 days
B. 4 days
C. 5 days
D. 6 days
Ans. A
Q14. If 1/2x +1/4x+1/8x=14 Then the value of x is:
A. 8
B. 12
C. 4
D. 16
Ans. D
Q15. What least value must be assigned to * so that the number 63576*2 is divisible by 8?
A. 1
B. 2
C. 3
D. 4
Ans. C