# CBSE Class 10-Mathematics: Chapter –5 Arithmetic Progressions Part 5

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**Question 22:**

If there are terms in an AP, prove that the ratio of the sum of odd terms and the sum of even terms is

**Answer:**

Let a, d be the I term & Cd of the AP.

**Question 23:**

Find the sum of all-natural numbers amongst first one thousand numbers which are neither divisible or by

**Answer:**

Sum of all-natural numbers in first integers which are not divisible by i.e. sum of odd integers.

No’s which are divisible by 5

Required sum

## 1 Mark Questions

**Question 1:**

The next term of the AP in …... is

(a) 97

(b) 92

(c) 99

(d) 95

**Answer:**

(a) 97

**Question 2:**

The 10^{th} term of the AP in , ………… is

(a) 45

(b) 47

(c) 48

(d) 50

**Answer:**

(b) 47

**Question 3:**

If the sum of the circumferences of two circles with radii is equal to the circumference of a circle of Radius , then

(a)

(b)

(c)

(d) None of these

**Answer:**

(a)

**Question 4:**

If the perimeter of a circle is equal to that of a square, then the ratio of their area is

(a)

(b)

(c)

(d)

**Answer:**

(c)