Questions

 4600 million

Frankenstein is an English Novel by Mary Shelley. In Frankenstein, Victor is a character who changes from an optimistic, eager young man to one who is anxious and Remorseful.

Government is to set to introduce new Rs. 100 coin with image of former Prime Minister Atal Bihari Vajpayee.

Radon gas is a source of natural groundwater pollution.

The 2nd largest consumer and importer of the LPG in the worldis India.

Hub works on layer 1 i.e, physical layer.

Let the missing numbers be x, y, a and b

x + y = 8 ---- (1)
a - b = 6 ---- (2)
x + a = 13 --- (3)
y + b = 8 ---- (4)

2x + a + y = 21 --- From (1 & 3)
a + y = 14 ----  From (2 & 4)

Substitute (2 & 4) in (1 & 3)

2x + 14 = 21
2x = 7
x = 3.5

From (1) ---> 3.5 + y = 8
=> y = 8 - 3.5 = 4.5

a + y = 14 => a = 14 - y = 14 - 4.5 => a = 9.5
From (4) ---- y + b = 8 => b = 8 - y = 8 - 4.5 = 3.5

Hence,
x = 3.5
y = 4.5
a = 9.5
b = 3.5