Question

natural numbers between 100 and 300 divisible by 4 and 5​

Answer 1

Answer:

All the numbers who has 0 and 5

they are divisible to 5

the numbers divisible to4 are also divisible to

last 2 digits are divisible to 4

Answer 2

Answer:

In order to find the sum, we shall first identify the series,

100,104,108,……..300 it is in Arithmetic progression

first term,a=100

Common Last term=300

difference,d=4

AP is 100, 104, 108 , 112, 116 ….300

a is 100, d is 4

Tn = 100 +(n-1)4 = 300

n is 51

Sn = 51/2 ( 400)

= 10200

If you wish to exclude 100,300

Answer would be obviously 9800