Question

a water tank has steps inside it. a monkey is siting on the top most step ( I . e) the first step. the water leavel is at the ninth step.​

Answer 1

Answer:

(i) 1st jump 1+3=4th\ step1+3=4th step

2nd jump 4-2=\ 2nd\ step\ 4−2= 2nd step

3rd jump 2+3=5th\ step\ 2+3=5th step

4th jump 5-2=\ 3rd\ step\ 5−2= 3rd step

5th jump 3+3=6th\ step3+3=6th step

6th jump 6-2=4th\ step6−2=4th step

7th jump 4+3=7th\ step\ 4+3=7th step

8th jump 7-2\ =\ 5th\ step\ 7−2 = 5th step

9th jump 5+3=\ 8th\ step\ 5+3= 8th step

10th jump 8-2=\ 6th\ step\ 8−2= 6th step

11th jump 6+3=\ 9th\ step\ 6+3= 9th step

he will reach 9th step in 11th jumps.

(ii) 1st jump = 9-4=\ 5th\ step\ 9−4= 5th step

2nd jump = 5+2=\ 7th\ step5+2= 7th step

3rd jump = 7-4=\ 3rd\ step\ 7−4= 3rd step

4th jump = 3+2=\ 5th\ step\ 3+2= 5th step

5th jump = 5-4=\ 1st\ step\ 5−4= 1st step

he reach back on the first step in fifth steps.

(iii)

(a) -3+2-3+2-3+2-3+2-3+2-3+2-3+2-3+2=\ -8−3+2−3+2−3+2−3+2−3+2−3+2−3+2−3+2= −8

(b) 4-2+4-2+4-2+4-2=\ 84−2+4−2+4−2+4−2= 8

thus, sum 8 in (b) represents going up by eight steps.