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161. The 5th term of an Arithmetic Progression (A .P.) is 26 and the 10th term is 51. Determine the 15th term of the A .P.

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162. Find (he sum of all the natural numbers less than 100 which are divisible by 6.

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163. Find the sum of all the natural numbers between 100 and 500 which are divisible by 8.

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164. Find the sum of all the natural numbers between 200 and 300 which are divisible by 4.

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165. If the 10th term of an A .P. is 52 and the 17th term is 20 more than the 13th term, find the A .P.

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166. Using A .P., find the sum of all 3 digit natural number which are multiples of 7.

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167. If the 8th term of an A .P. is 31 and the 15th term is 16 more than the 11th term, find the A .P.

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168. Find the sum of the following : 25 + 28 + 31 +.........+ 100.

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Solution not provided.
Ans. 37674

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170. Which term of the arithmetic progression 5, 15, 25...........will be 130 more than its 31st term?

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