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Primary 4 | Maths
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Date Posted: 6 years ago
Views: 326
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2506.
The first step may confuse you a little (Ones). So to be divisible by 7, it has to end with something divisible. List the timetable until you reach 49, as 4 + 9 = 13.
7 can't be 3 times of a number.
14, (look at the 4!) 4 can't be 4 times of a number.
21, 1 obviously can't!!
42, 2 can't.
that leaves us with 36 & 49. But we can rule 49 out as 4 + 9 is 13
So from here we know Ones is 6.
Ones is 3 times as many as thousands. So 6 ÷ 3 = 2.
6 - 1 = 5.(Hundreds)
6+5+2 = 13, so Tens have to be 0.
The first step may confuse you a little (Ones). So to be divisible by 7, it has to end with something divisible. List the timetable until you reach 49, as 4 + 9 = 13.
7 can't be 3 times of a number.
14, (look at the 4!) 4 can't be 4 times of a number.
21, 1 obviously can't!!
42, 2 can't.
that leaves us with 36 & 49. But we can rule 49 out as 4 + 9 is 13
So from here we know Ones is 6.
Ones is 3 times as many as thousands. So 6 ÷ 3 = 2.
6 - 1 = 5.(Hundreds)
6+5+2 = 13, so Tens have to be 0.
Date Posted:
6 years ago
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