Very important questions of arithmetic progression CBSE class 10th
1. The first term of AP is 5 the last term is 45 and the sum is 400. Find the number of terms and the common difference.
2. The sum of ₹700 is to be used to give seven cash prizes to students of a school for their overall academic performance. if each prizes is ₹20 less than its preceding prizes. find the value of each of the prizes
3. If the sum of first 4 terms of an AP 40 and that of first 14 terms is 280 find the sum of its first n terms.
4. How many terms of the AP 17, 15, 13, 11..... must be added to get the sum 72 ?explain the double answer.
5. Split 69 into three parts such that they form in AP and the product of two smaller parties 483.
6. The first time, common difference and the last term of an AP are 12, 6 and 252 respectively. Find the sum of all terms of this AP.
7. Find the sum of the first 15 multiples of 8.
8. If the mth term of an AP be 1/n and nth term be 1/m, then show that it's (mn)th term is 1.
9. find the sum of all 2 digit numbers which when divided by 3 gives one as a reminder.
10. Find the sum of all 2 digit odd positive numbers.
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