A number 5
A number is divisible by 24, 25, and 120 if it is increased by 20. Find the number.
Correct answer:
x =
580
Step-by-step explanation:
2
4
=
2
3
⋅
3
2
5
=
5
2
1
2
0
=
2
3
⋅
3
⋅
5
L
C
M
(
2
4
,
2
5
,
1
2
0
)
=
2
3
⋅
3
⋅
5
2
=
6
0
0
a
=
L
C
M
(
2
4
,
2
5
,
1
2
0
)
=
6
0
0
a
=
x
+
2
0
x
=
a
−
2
0
=
6
0
0
−
2
0
=
5
8
0
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A number is divisible by 24, 25, and 120 if it is increased by 20. Find the number.
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the least common multiple
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You need to know the following knowledge to solve this word math problem:
algebra
prime numbers
least common multiple (LCM)
expression of a variable from the formula
arithmetic
multiplication
numbers
natural numbers
Grade of the word problem:
practice for 12 year olds
practice for 13 year olds
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