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Syllabus

Q.25. Rs. 16000 invested at 10 % p.a., compounded semi-annually, amounts to Rs. 18522. Find the time period of investment.

3. The shopkeeper is arranging 28 laptops on shelves with 5 laptops on a shilf. How many shelves will be full ? How many will be on the shelf that is not full ?

1. Insert two rational numbers between -1/3 and 1/2 and arrange in ascending order.

2. Insert three rational numbers between 4 and 4.5.

3. Find three rational numbers between 3 and 4.

4. Find ten rational numbers between -2/5 and 1/7

3. Insert two rational numbers between $-\frac{1}{3}and-\frac{1}{2}$ and arrange in ascending order.

3. Suraj, Azim, Jo, and Aastha got an average of 95 points each in a spelling competion. What was their total score ?

Q.20. At what rate percent p.a. compound interest would Rs. 80000 amount to Rs. 88200 in two years, interest being compounded yearly. Also find the amount after 3 years at the above rate of compound interest.

^{m+1}.2^{n}- 8^{n})/2^{3m }= 3/8; prove that: n+1=m