By selling 12 oranges for one taka a man loses 20%. How many for a taka should he sell to get a gain of 20%?

1. what is the correct(nearest)ans- 12345+6789-8765=?
8389
10289
10300
10400

Ans: 10400

2. What is the value of 3*4*5+6*0*7
60
66
102
73

Ans: 60

3. The average of 5 quantities is 6. The average of 3 of them is 8. What is the average of the remaining two numbers?
6.5
4
5.5
3

Ans: 3

4. What is 1 percent of .025?
.25
.025
.0025
.00025

Ans: .00025


5. By selling 12 oranges for one taka a man loses 20%. How many for a taka should he sell to get a gain of 20%?
10
8
9
11

Ans: 8