1 The ratio of Bob's weight to Colin's weight is 6: 7. If Bob
weighs 83.7 kg, how much does Colin weigh?
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Q.1 One afternoon temperature of a place went up from −4℃ to 5℃.
a) By how many degrees did the temperature rise?
b) During the afternoon the temperature then fell by 7℃ from 5℃.
What was the temperature at the end of the afternoon?0
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