Question: Identify the number that is not divisible by 15.
Options:
30
45
60
70
Correct Answer: 70
Solution:
A number is divisible by 15 if it is divisible by both 3 and 5. 70 is not divisible by 3.
Identify the number that is not divisible by 15.
Practice Questions
Q1
Identify the number that is not divisible by 15.
30
45
60
70
Questions & Step-by-Step Solutions
Identify the number that is not divisible by 15.
Step 1: Understand what it means for a number to be divisible by 15. A number is divisible by 15 if it can be divided by 15 without leaving a remainder.
Step 2: Know that a number is divisible by 15 if it is also divisible by both 3 and 5.
Step 3: Check if the number 70 is divisible by 3. To do this, add the digits of 70 (7 + 0 = 7). Since 7 is not divisible by 3, 70 is not divisible by 3.
Step 4: Since 70 is not divisible by 3, it cannot be divisible by 15.
Divisibility Rules – A number is divisible by 15 if it is divisible by both 3 and 5.
Divisibility by 3 – A number is divisible by 3 if the sum of its digits is divisible by 3.
Divisibility by 5 – A number is divisible by 5 if it ends in 0 or 5.
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