(51) . . 3/1000 written as a fraction is:
(52) . . While watching TV'from 7 pm to .8 p.m. you count 20 commercials, each 30 second long. What nearest percent of the hour is taken by the commercials.
(53) . On neon sign blinks every 6 seconds. Another neon sign blinks every 8 seconds. If they blink together and you begin counting seconds, how many seconds after they will next blink together?
4 seconds
10 seconds
14 seconds
None
(54) . In a caravan, in addition to 50 hens there are 45 goats and 8 camels with some keepers. If the total number of feet be 224 more than the number of heads, find the number of keepers.
(55) . A mixture contains alcohol and water in the ratio of 12:5. On adding 14 litres of water, the ratio of alcohol to water becomes 43. The quantity of alcohol in the mixture is:
18 litres
24 litres
26 litres
None
(56) . Express 78 as percentage:
(57) . The radius of a sphere is increased by 10%. The surface area increases by:
(58) . The average of 7 consecutive numbers is 33. The largest of these number is:
(59) . . If x3 + 1x3 = 52, the value of x + 1x is:
(60) . If 4a = 8b, what is he ratio of a to b?