Jasper Eng's answer to Cindy's Primary 6 Maths Data Analysis Singapore question.
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Take the multiplication of last digit of each value:
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9
Observe 5:
Multiplication of 5 will only result last digit to be
Either 0 OR 5:
In the options,
There is only 0, 6, 7 and 9.
Hence 0 is the solution:
Furthermore,
Taking 2 x 5 will result in 0 for last digit.
Hence the last digit will be 0, regardless of the rest of multiplication.
1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9
Observe 5:
Multiplication of 5 will only result last digit to be
Either 0 OR 5:
In the options,
There is only 0, 6, 7 and 9.
Hence 0 is the solution:
Furthermore,
Taking 2 x 5 will result in 0 for last digit.
Hence the last digit will be 0, regardless of the rest of multiplication.
Date Posted:
3 years ago
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