Q1) My present age is a multiple of 8. Next year my age will be a multiple of 7.
What is my present age ?
a) 56
c) 28
b) 48
d) 16
Answers
Step-by-step explanation:
List the multiples of 8 up to an age than nobody lives to.
8,16,24,32,40,48,56,64,72,80,88,96,104,112,120
List the multiples of 7 up to an age than nobody lives to.
7,14,21,28,35,42,49,56,63,70,77,84,91,98,105,112,119
Look through the lists to find one in each list such that the one
in the second list is 1 more than the one in the first list.
We find 48 in the first list and 49 in the second list.
We find 104 in the first list and 105 in the second list.
(Many people have lived to be 104, and there are some living now that old!).
Two solutions. "I am 48" or "I am 104"
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Answer:
b) 48
bcs. 48 is multiple of 8 and hence next year he is 49 years old so 49 is divisible by 7.
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