How many two digit numbers are divisible by 3.
We know, an = a + (n – 1)d
⇒ 99 = 12 + (n – 1) 3
⇒ 99 = 12 + 3n – 3
⇒ 99 = 9 + 3n
⇒ 3n = 90
⇒ n = 30Hence, there are 30 two-digit numbers which are divisible by 3.
Write first four terms of the AP, when the first term a and the common difference d are given as follows:
a = –2, d = 0
Write first four terms of the AP, when the first term a and the common difference d are given as follows:
a = 4, d = – 3
Write first four terms of the AP, when the first term a and the common difference d are given as follows:
a = – 1.25, d = – 0.25
For the following APs, write the first term and the common difference
3, 1, – 1, – 3, . . .
For the following APs, write the first term and the common difference
– 5, – 1, 3, 7, . . .
For the following APs, write the first term and the common difference
0.6, 1.7, 2.8, 3.9, . . .
Mock Test Series
