Answer:
1.the sum of three consecutive odd number is 177 find the number
let three consecutive odd number be x,x+2&,x-2.
by question
answer
x+x-2+x+2=177
3x=177
x=177/3=59
x-2=59-2=57
x+2=59+2=61
required no are 59,57&61
2. find three consecutive even
number which add 1524
answer
let three consecutive even
number be x-2,x+2&x
by question
x-2+x+2+x=1524
3x=1524
x=1524/3=508
x-2=508-2=506
x+2=508+2=600
required no are 508,506&600
3.when a number is doubled and the added to 13 the result is 3.8 find the number
answer
let no be x
by question
2x+13=3.8
2x=3.8-13
x=-9.2/2=-4.6 is the required number