Question

The average of 5 consecutive odd numbers is 39.Find
the multiplication of first and the last number.
2) 1550 3) 1505
4) Cannot be determined 5) None of these
1) 5105​

Answer 1

Answer:

Let the first five consecutive odd numbers be x,x+2,x+4,x+6,x+8.

Now, it is given that the sum of first five consecutive odd numbers is 575 which means:

x+(x+2)+(x+4)+(x+6)+(x+8)=575

⇒5x+20=575

⇒5x=575−20

⇒5x=555

⇒x=

5

555

Therefore, the first odd integer is 111 then the second integer is x+2=111+2=113, the third integer is x+4=111+4=115, the forth integer is x+6=111+6=117 and the fifth integer is x+8=111+8=119

The set of first five consecutive odd numbers is 111,113,115,117,119. Similarly, the set of next five consecutive odd numbers will be 121,123,125,127,129 and their sum can be determined as follows:

121+123+125+127+129=625

Hence, the sum of next set of consecutive odd numbers is 625.

Answer 2

Answer:

5105 this very static answer