Question

How many numbers up to 400 are divisible by 5 and 7 together?
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Answer 1

Answer:

ஃ There are 11 numbers up to 400 are divisible by 5 and 7 together.

Step-by-step explanation:

For that find the LCM of 5 and 7

LCM = 35

35 × 1 = 35

35 × 2 = 70

35 × 3 = 105

35 × 4 = 140

35 × 5 = 175

35 × 6 = 210

35 × 7 = 245

35 × 8 = 280

35 × 9 = 315

35 × 10 = 350

35 × 11 = 385

35 × 12 = 420

Answer 2

Answer:

There are 11 numbers up to 400 that are divisible by 5 and 7 together.

Step-by-step explanation:

We have to find how many numbers up to $400$ are divisible by $5$ and $7$ together.

Find the Lowest Common Multiple (LCM) of $5$ and $7$:

Since both $5$ and $7$ are prime numbers, so multiply them to find the LCM:

$5\times7=35$

Divide $400$ by $35$:

On dividing $400$ by $35$, we get the remainder as $11$.

Therefore, there are 11 numbers up to 400 that are divisible by 5 and 7 together.