All numbers divisible by $8$ must also be divisible by $4$ .

True

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False

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Solution

The correct option is A True
Step 1: Understanding the property tests of divisibility:
Property: If a number is divisible by another number, then it is divisible by each of the factors of that number.
Step 2: Find the factors and check the divisibility.
Factors of $8 = 1, 2, 4, 8$ .
Here $4$ is a factor of $8$ .
Consider a number $40$ . It is divisible by $8$ , hence it is also divisible by $4$ .
Therefore, the given statement is true.

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Similar questions

All numbers divisible by $4$ must also be divisible by $8 .$

All numbers divisible by 4 must also be divisible by 8 and all numbers divisible by 8 must also be divisible by 4

Choose the correct option regarding the accuracy of the given statements:
Statement 1: All numbers divisible by 4 must also be divisible by 8
Statement 2: All numbers divisible by 8 must also be divisible by 4

Which of the following statements are true?

(a) If a number is divisible by 3, it must be divisible by 9.

(b) If a number is divisible by 9, it must be divisible by 3.

(d) If a number is divisible by 9 and 10 both, then it must be divisible by 90.

(e) If two numbers are co-primes, at least one of them must be prime.

(f) All numbers which are divisible by 4 must also be divisible by 8.

(g) All numbers which are divisible by 8 must also be divisible by 4.

(h) If a number exactly divides two numbers separately, it must exactly divide their sum.

(i) If a number exactly divides the sum of two numbers, it must exactly divide the two numbers separately.

Question 1

Which of the following statements are true:
(a) If a number is divisible by 3, it must be divisible by 9.
(b) If a number is divisible by 9, it must be divisible by 3.
(c) If a number is divisible by 18, it must be divisible by both 3 and 6.
(d) If a number is divisible by 9 and 10 both, then it must be divisible by 90.
(e) If two numbers are co-primes, at least one of them must be prime.
(f) All numbers which are divisible by 4 must also be divisible by 8.
(g) All numbers which are divisible by 8 must also be divisible by 4.
(h) If a number exactly divides two numbers separately, it must exactly divide their sum.
(i) If a number exactly divides the sum of two numbers, it must exactly divide the two numbers separately.

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All numbers divisible by 8 must also be divisible by 4.

All numbers divisible by $8$ must also be divisible by $4$ .