Decimals and Fractions Practice Test 1

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Question : 24 of 40

Marks: +1, -0

The expression

1/8+1/10+1/11+1/15+1/20+1/41

+1/110+1/1640

is equal to

1
$13/ 15$
$11 /15$
$7 /15$

Solution:

1/8+1/10+1/11+1/15+1/20

+1/41 +1/110+1/1640

LCM of 8, 10, 11, 15, 20, 41, 110, 1,640 is 10824

∴{13,530 +10,824 +9,840+ 7,216+5,412 +2,640+ 984 +66}/{1,08,240}

={50,512 }/{1,08,240}=7/15

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