CBSE-X- Mathematics - Arithmetic Progression

The next term of an AP  $\sqrt{7}$ , $\sqrt{28}$ , $\sqrt{63}$ ,......  is 

•  $\sqrt{70}$  

•  $\sqrt{84}$  

•  $\sqrt{98}$  

•  $\sqrt{112}$  

 If the 

 $n^{th}$   term of an AP is  $\left(2n+1\right),$   then the sum of its first three terms is

•  $6n+3$  

•  $15$  

•  $12$  

•  $21$  

If $4,\ x_1,\ x_2,\ x_3,\ 28$  are in AP,  then  $x_3$ is ____

• 19

• 23

• 22

• cannot be determined.

The sum of first $n$  terms of an AP is  $\left(3n^2+6n\right)$ . The common difference  $\left(d\right)$  of the AP is  ________

•  $6$  

•  $9$  

•  $15$  

•  $-3$  

The  $5^{th}$  term of an AP is $-3$ and its common difference is  $-4$ . The sum of its first 10 terms is  ______

•  $50$  

•  $-50$  

•  $30$  

•  $-30$  

The 13^th term of an AP is 4 times its 3^rd term. If its 5^th term is 16, then the sum of its first ten terms is _______

• 150

• 175

• 160

• 135

The common difference of the AP  $\frac{1}{p}$ , $\frac{1-p}{p}$ , $\frac{1-2p}{p}$  , ........ is

•  $p$  

•  $-p$  

•  $-1$  

•  $1$  

Which term of an AP 72, 63, 54, ...... is 0 ?

• 8^th

• 9^th

• 10^th

• 11^th

The sum of first $n$  odd natural numbers is ____

•  $2n-1$  

•  $2n+1$  

•  $n^2$  

•  $n^2-1$  

The first and last terms of an AP are 1 and 11. If the sum of its terms is 36, then the number of terms will be _______

• 5

• 6

• 7

• 8