Question : The duration of the Mesolithic period is from about ______ years ago to ______ years ago.

Option 1: 14000, 10000

Option 2: 17000, 12000

Option 3: 12000, 10000

Option 4: 10000, 7000

Question : Silk is obtained from:

Option 1: Mulberry tree

Option 2: Saliva of the silk worm

Option 3: Larvae of silk worm

Option 4: Cocoon of silk worm

Question : In how many years will a sum of Rs. 3000 yield an interest of Rs.1080 at 12% per annum simple interest?

Option 1: $4$ years

Option 2: $3$ years

Option 3: $5$ years

Option 4: $2\frac{1}{2}$ years

Question : A sum of Rs. 3000 amounts to Rs. 6000 in two years at compound interest. The interest for four years is:

Option 1: Rs. 9000

Option 2: Rs. 12000

Option 3: Rs. 6000

Option 4: Rs. 3000

Question : Six years ago, the ratio of ages of A to B was 7 : 5. 4 years from now, the ratio of their ages will be 11 : 9. What is A’s age at present?

Option 1: $24 \frac{1}{2}$ years

Option 2: $22 \frac{1}{2}$ years

Option 3: $23 \frac{1}{2}$ years

Option 4: $21 \frac{1}{2}$ years