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# arithmetic simple interest questions and answers

1
`The simple interest on a sum of money is 4/9 of the principal. Find the rate percent and time, if both are numerically equal.`
1. `6 years 2 months`
2. `6 years 5 months`
3. `6 years 8 months`
4. `none of these`
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4
`How long will it take a sum of money invested at 5% p.a. at S.I. to increase its value by 40% ?`
1. `6 years`
2. `7 years`
3. `8 years`
4. `9 years`
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5
`The rate at which a sum becomes four times of itself in 15 years at S.I. will be :`
1. `10%`
2. `15%`
3. `20%`
4. `40%`
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6
`The simple interest at x% for x years will be Rs. x on sum of :`
1. `x`
2. `100x`
3. `[100/x]`
4. `[x/100]`
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7
`The simple interest on Rs. 10 for 4 months at the rate of 3 paise per rupee per month is :`
1. `Rs. 1.20`
2. `Rs. 1.4`
3. `Rs. 2.25`
4. `Rs. 3.21`
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8
```In how many years will a sum of money double itself at 10% per annum?
```
1. `2 years 4 months`
2. `4 years 2 months`
3. `10 years`
4. `10 years 8 months`
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11
`In how many years Rs 150 will produce the same interest at 8% as Rs. 800 produce in 3 years at 9/2%`
1. `8 years`
2. `9 years`
3. `10 years`
4. `11 years`
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16
`Find the simple interest on Rs. 68,000 at 16 2/3% per annum for 9 months.`
1. `7500`
2. `8000`
3. `8500`
4. `9000`
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19
```A sum of money doubles in 16 years. Find out the rate of interest required.

```
1. `5 ¼%`
2. `6 ¼%`
3. `7 ¼%`
4. `8¼%`
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20
`A certain sum of money amounts to Rs. 1008 in 2 years and to Rs.1164 in 3 ½ years. Find the sum and rate of interests. `
1. `700, 13%`
2. `700, 15%`
3. `800, 13%`
4. `800, 15%`