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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 ?

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

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.

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