Question

Q10) A water tank has stepsinside it. A

monkey is sitting on the topmost step (i.e.,
the first

step). The water level is at the ninth step.

(i) He jumps 3 steps down and then jumps
back 2 steps up. In how many jumps will he
reach the water level?

(ii) After drinking water, he wants to go
back. For this, he jumps 4 steps up and then
jumps back 2 steps down in every move. In
how many jumps will he reach back the top
step?

Answer 1

50 & 30

Explanation:

Ii

2+3=5

3-2=1

5*10=50

ii

4+2=6

4-2=2

10/2=5

6*5=30

Answer 2

(i) 11

(ii) 5

Explanation:

(i)

Jump Number Step Number

0 (beginning) 1

1 4

2 2

3 5

4 3

5 6

6 4

7 7

8 5

9 8

10 6

11 9

It takes 11 jumps to reach step 9.

(ii)

Jump Number Step Number

0 (beginning) 9

1 5

2 7

3 3

4 5

5 1

It takes 5 jumps to reach step 1.