which of the following number is divisible by both 5 and 10 (a-45 ,b-450, c-405, d-412)
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A number is divisible by 5 if its units place is 0 or 5. Consider the following numbers which are divisible by 5, using the test of divisibility by 5: 50, 75, 90, 165, 120. In 50, the unit's place digit is 0. Hence, 50 is divisible by 5.
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Answer:
b) 450
- Divisibility rule of 5: Number that is divisible by 5 must end in 5 or 0.
Its divisible by 5 as the unit digit is 0 - 450/5 = 90
- Divisibility rule of 10: For a number to be divisible by 10, the last digit must be a 0.
Its divisible by 10 as the unit digit is 0 - 450/10 = 45
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