Question

question 22.23 and 24
if it is also possible; do 21​

Answer 1

21.its 3 and 4

no explanation..... just imagined it

22.carriage=12

let compartments in each carriage be be x

at 3rd compartment and 18th carriage can be written as

18=2x+y

50=6x+y

4x=32

x=8

therefore there are 8 compartments on carriage 1

23.CASE 1: when ends are occupied

the kangaroo sit by leaving one space=4

kangaroo sit by leaving 2 spaces=1

kangaroo sit by leaving 3 and 1 space=1

kangaroo sit by leaving 1 and 3 space=1

CASE 2:

when ends aren't filled=1

total=8

24.

ABCD=x

ABEF=y

BCFG=z

CDGH=p    (h is hiding and can't be seen in picture)

EFGH=q

ADEH=r

x+z+p=14------1

x+r+p=16-------2

y+q+r=24------3

F=y+z+q

now

eq 2- eq 1=

r-z=2

r=z+2

putting r=z+2 in eq 3

y+q+z+2=24

y+q+z=22