Current location - Training Enrollment Network - Mathematics courses - Math problems in grade one. The following array of numbers is made up of odd numbers.
Math problems in grade one. The following array of numbers is made up of odd numbers.
(1) Let the first number in the first row be X, then the other three numbers are x+2, x+8, X+ 10.

(2) According to the meaning of the question: x+x+2+x+8+x+ 10=200,

Solution: x=45,

These four numbers are 45, 47, 53 and 55 in turn.

A: These four numbers are 45, 47, 53 and 55 in turn.

(3) it does not exist.

∫4x+20 = 420,

Solution: x= 100,

It's even, it doesn't matter, so it doesn't exist.