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1
What is the unit digit of 3¹⁰?
A.1
B.3
C.7
D.9
2
The ratio of ages of P and Q is 2:3. After 12 years, it becomes 5:7. After how many years will it be 3:4?
A.6
B.8
C.10
D.15
3
The average of 10 numbers is 50. If 5 numbers have an average of 45, what is the average of the other 5?
A.50
B.55
C.60
D.65
4
What is the sum of all even numbers between 1 and 10?
A.20
B.25
C.30
D.35
5
A mixture of 50 liters has milk and water in the ratio 4:1. How much milk is there?
A.30 liters
B.35 liters
C.40 liters
D.45 liters
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