ASSISTANT in Plainning & Development PPSC Past Paper (BS-16)-2019

Formula used will be – s(n) = s(n-1) × s(n-2)

2 × 3 = 6

3 × 6 = 18  

6 × 18 = 108

108 × 18 = 1944

Solution:

Age of Mansoor = 2

Age of Laila = 4×2=8

After 1 year

Mansoor’s age = 3

Laila’s age = 9

After 2 years

Mansoor’s age = 4

Laila’s age = 10

After 3 years

Mansoor’s age = 5

Laila’s age = 11

After 4 years

Mansoor’s age = 6

Laila’s age = 12

So, Mansoor’s age is 6 years when he is half the age of her older sister Laila.

Solution:

(a+b+c)/3=45

a+b+c=135—–(1)

(a+b)/2=40

a+b=80——-(2)

(b+c)/2=43

b+c=86——(3)

add(2) and (3)

a+b+c+b=80+86=166

135+b=166

b=166-135=31 Kg