10 evacuator works 10 hour daily to remove 2500 cubic feet of Earth in 3 days. How many evacuator work 6 hour daily to remove 5000 cubic feet of Earth in 2 days?

Let x evacuator are required.

Evacuators are inversely proportional to hours and days are directly proportional to work progress

So,

X/10=(10/6)*(5000/2500)*(3/2)

=48

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In the class of 10 boys and 5 girls boys have 4 balls each and girls have 1 ball each what will be the average number of balls in class?

={( number of boys X number of balls)+( number of girls X number of balls)}/ total students

={(10Ã—4)+(5Ã—1)}/10+5

=(40+5)/15

= 3 is the average number of balls in class.

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In following alphabet series , one term missing as shown by question mark . Choose missing term from options.

Z, L, X, J, V, H, T, F, ?, ?

The given sequence consists of two series -- Z, X, V, T, ? and L, J, H, F, ?, both consisting of alternate letters in a reverse order.

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If x and y are the two digits of the number 653xy such that this number is divisible by 80, then x + y = ?

80 = 2 x 5 x 8

Since 653xy is divisible by 2 and 5 both, so y = 0.

Now, 653x is divisible by 8, so 13x should be divisible by 8.

This happens when x = 6.

x + y = (6 + 0) = 6.

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