Class 10 Maths1)If p, q, r and s are in A.P. then r – q is

Correct Option: C

s – r

Since p, q, r, s are in A.P.

∴ (q – p) = (r – q) = (s – r) = d (common difference)

Class 10 Maths2)If the sum of three numbers in an A.P. is 9 and their product is 24, then numbers are

Correct Option: D

2,3,4

Let three numbers be a – d, a, a + d

∴ a – d +a + a + d = 9

⇒ 3a = 9

⇒ a = 3

Also (a – d) . a . (a + d) = 24

⇒ (3 -d) .3(3 + d) = 24

⇒ 9 – d² = 8

⇒ d² = 9 – 8 = 1

∴ d = ± 1

Hence numbers are 2, 3, 4 or 4, 3, 2

Class 10 Maths3)The sum of all two digit odd numbers is

Correct Option: A

2475

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