Question

how many two digit numbers are divisiable by 3​

Answer 1

Answer:

30 two digit number are divisible by 3

 

Answer 2

Given :

• A.P : 12, 15, 18, ........ 99
• First term (a) = 12
• Common Difference (d) = 3
• Last term (Aₙ) = 99

To Find :

We have to find that how many two numbers are divisible by 3 (n).

Solution :

We know the formula to calculate the last term by putting all the values which we know we can find the Number of term (n).

⇒ Aₙ = a + (n - 1)d

→ 99 = 12 + (n - 1)3

→ 99 - 12 = (n - 1)3

→ 87 = (n - 1)3

→ n - 1 = 87/3

→ n - 1 = 29

→ n = 29 + 1

→ n = 30

∴ The two digit numbers which are divisible by 3 are 30.