Question

How many 3-digit numbers are there
between (a.) 40 and 400
(b) 786 and 920​

Answer 1

Answer:

(a). There are 399 three digit number between 40 and 400.

(b). There are 134 three digit number between 786 and 134.

Answer 2

Answer:

a) 120 b)44

Step-by-step explanation:

42,45,- - - 399

399-42 =(n-1)* 3

357/3 =n-1

119= n-1

n =119+1 =120

n =120

789,792, - - - 918

918-789 =n-1 *3

129/3 = n-1

43= n-1

n =43+1=44