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1. What percentage of numbers from 1 to 70 have 1 or 9 in the unit’s digit?

1

14

20

21

None of these

2. (935421 × 625) = ?

575648125

584638125

584649125

585628125

3. Reena took a loan of Rs.1200 with simple interest for as many years as the rate of interest. If she paid Rs.432 as interest at the end of the loan period, what was the rate of interest?

3.6

6

18

Data inadequate

4. A leak in the bottom of a tank can empty the full tank in 8 hours. An inlet pipe fills water at the rate of 6 litres a minute. When the tank is full, the inlet is opened and due to the leak, the tank is empty in 12 hours. How many litres does the cistern hold?

7580

7960

8290

8640

5. In what ratio must a grocer mix two varieties of pulses costing Rs.15 and Rs.20 per kg respectively so as to get a mixture worth Rs.16.50 kg?

3 : 7

5 : 7

7 : 3

7 : 5