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1
A 60-liter mixture has 40% alcohol. How much alcohol is added to make it 60% alcohol?
A.20 liters
B.25 liters
C.30 liters
D.35 liters
2
A sum of Rs. 780 is divided among A, B, and C in the ratio 2:3:4. If Rs. 60 is added to each share, what is the new ratio?
A.11:16:21
B.2:3:4
C.5:7:9
D.7:10:13
3
What is the sum of all even numbers between 1 and 10?
A.20
B.25
C.30
D.35
4
The average of 6 numbers is 15. If a seventh number 21 is added, what is the new average?
A.16
B.17
C.18
D.19
5
The average of 5 numbers is 20. If a sixth number 30 is added, what is the new average?
A.21
B.22
C.23
D.24
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