Question

How many numbers between 100 and 300 begin or and with 2?1) 100 2) 110 3) 120 4) 180​

Answer 1

And from 200 to 300, there are 100 numbers beginning with 2. They are 200, 201, 202...,299. There are 110 numbers between 100 and 300 which either begin with or end with 2.

Answer 2

Given :- How many numbers between 100 and 300 begin or and with 2 ?

1) 100

2) 110

3) 120

4) 180

Answer :-

→ first number = 102 = ends with 2,

→ 2nd = 112 = ends with 2,

and,

→ 10th number = 192 = ends with 2

→ 11th number = 200 = start with 2.

so,

→ from 100 to 200 we have = 11 numbers .

now,

→ from 201 to 299 total numbers = Start with 2 = 99 numbers .

therefore,

→ Total numbers that begins or ends with 2 are = 11 + 99 = 110 (Option 2) (Ans.)

Learn more :-

let a and b positive integers such that 90 less than a+b less than 99 and 0.9 less than a/b less than 0.91. Find ab/46

p...

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