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  1. Four numbers are in the ratio 1 : 2 : 3 : 4. Their sum is 16. The sum of the first and fourth
    number is equal to :
    1. 5
    2. 8
    3. 10
    4. 80
Correct Option: B

x + 2x + 3x + 4x = 16

∴  x =
16
 = 1.6
10

∴  Sum = 1.6 + 6.4 = 8


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