Question

Show that 5×11×13+13 is a composite number.
Write all the steps please!!​

Answer 1

Solution:

➩ 5⃣ × 1⃣1⃣ × 1⃣3⃣ + 1⃣3⃣

➩ 5⃣5⃣ × 1⃣3⃣ + 1⃣3⃣

➩ 7⃣1⃣5⃣ + 1⃣3⃣

➩ 7⃣2⃣8⃣

ஃ Here , 5⃣ × 1⃣1⃣ × 1⃣3⃣ + 1⃣3⃣ is composite number because it has at least three factor.

✅ Hence proved ✅

Answer 2

$\huge{ \color{aqua}{ \underbrace{ \underline{ \color{lime}{ \mathbb{✯꧁᭄⋆SoLuTiOn⋆᭄꧂✯ }}}}}}$

$\to \: 5 \times 11 \times 13 + 13$

$\to \: 728$