Sample Question Paper Mathematics- Standard (041) Class- X, Session: 2021-22 TERM II

CBSE class 10th Mathematics- Standard sample question paper

Section A

Ques 1- Find the value of a25 – a15 for the AP: 6, 9, 12, 15, ………..

Solution: a = 6, d = 3 ; a25 = 6 + 24(3) = 78
a15 = 6 + 14(3) = 48 ; a25 – a15 = 78 – 48 = 30

OR

If 7 times the seventh term of the AP is equal to 5 times the fifth term, then find the value of its 12th term.

Solution: 7(𝑎 + 6𝑑) = 5(𝑎 + 4𝑑)
⇒2𝑎 + 22𝑑 = 0 ⇒ 𝑎 + 11𝑑 = 0 ⇒ 𝑡12 = 0