216 .
40 cattle can graze a grassland for 60 days. The number of cattle that will graze a grassland 2 times as large in 40 days is:
A.150
B. 120
C. 90
D.60
E.30
217 .
In a 3 litre mixture of water and milk, 50 % is milk. How much water should be added so that the percentage of milk becomes 20 % ?
A.1.5 litre
B. 2.5 litre
C. 3.5 litre
D.4.5 litre
E.5.5 litre
218 .
Find out the missing number.
0 , 1 , 1 , 2 , 3 , 5 ,__ , 13 , 21
A.7
B. 8
C. 9
D.10
E.11
219 .
$\sqrt{97344} = ?$
A.302
B. 312
C. 322
D.332
E.342