Question

sum of three consecutive number is 51 . The middle one is​

Answer 1

Answer:

17

Step-by-step explanation:

Let the middle number be 'a', then, remaining numbers should be a - 1 and a + 1.

Since their sum is 51.

=> (a - 1) + a + (a + 1) = 51

=> a - 1 + a + a + 1 = 51

=> a + a + a = 51

=> 3a = 51

=> a = 51/3

=> a = 17

Middle number is 17

Answer 2

Step-by-step explanation:

Let

the middle number =a

Then remaining numbers=(a-1) and (a+1)

According to the question

${:}\longrightarrow$The sum of these three numbers=51

${:}\longrightarrow$$a+(a-1)+(a+1)=51$

${:}\longrightarrow$$a+a-1+a+1=51$

${:}\longrightarrow$$3a+0=51$

${:}\longrightarrow$$3a=51$

${:}\longrightarrow$$a={\frac {51 }{3}}$

${:}\longrightarrow$${\underline{\boxed{\bf {a=17}}}}$

• Hence

the middle number =a=17