Question

Part-A
Section-1
1. For the AP: 1.-1.-3.-5.... write the common difference d 5
2. 2.
is this AP? If yes, give the reason
3. Write the three more terms of AP: 0.6, 1.7.2.8.3.9
4. Write the number of terms of the AP: 1.3,5.....31
OR
Find the last three digit number which is divisible by 7
5. Determine the formula of the sum of first positive integers
OR​

Answer 1

Answer:

The greatest 3-digit number divisible by 7 is 994. Therefore the three-digit numbers are 105, 112, 119, 126,………….. 994. This is an Arithmetic progression with first term a=105, common difference d = 7, last term =994.