Question

A x 4 = E
B ÷ 4 = E
C + 4 = E
D - 4 = E
___________
& A + B + C + D = 100

Challenge
*what is the value of E ?*

Answer 1

Hi ,

A × 4 = E

A = E / 4 -----( 1 )

B ÷ 4 = E

B = 4E -------( 2 )

C + 4 = E

C = E - 4 ------( 3 )

D - 4 = E

D = E + 4 ------( 4 )

But ,

A + B + C + D = 100

E / 4 + 4E + E - 4 + E + 4 = 100

[ from equations ( 1 ) , ( 2 ) , ( 3 ) and ( 4 ) ]

E / 4 + 6E = 100

( E + 24E ) / 4 = 100

25E = 400

E = 400 / 25

E = 16

Therefore ,

The value of E = 16

I hope this helps you.

:)