Question : The price of a mobile is Rs. 30,000. The value of the mobile depreciates by 12% at the end of the first year and at the end of next year, it depreciates by 15%. What will be the value of the mobile after 2 years?

Option 1: Rs. 25,255

Option 2: Rs. 22,440

Option 3: Rs. 20,000

Option 4: Rs. 25,000

Question : A sum of Rs. 500 becomes Rs. 580 at simple interest in 2 years. In how many years will the sum of Rs. 650 amounts to Rs. 858 at the same rate of simple interest?

Option 1: 4 years

Option 2: 8 years

Option 3: 5 years

Option 4: 6 years

Question : The present age of two persons is 36 years and 50 years respectively. If after n years, the ratio of their age will be 3 : 4, then the value of n is:

Option 1: 4

Option 2: 7

Option 3: 6

Option 4: 3

Question : A sum of Rs. 600 becomes Rs. 840 at simple interest in 4 years. In how many years will the sum of Rs. 1500 amount to Rs. 2100 at the same rate of simple interest?

Option 1: 5 years

Option 2: 4 years

Option 3: 2 years

Option 4: 3 years

Question : What will be the ratio of simple interest earned by a certain amount at the same rate of interest for 8 years and 20 years?

Option 1: 5 : 7

Option 2: 2 : 5

Option 3: 3 : 5

Option 4: 4 : 3