Riddle Math Problems - Free Printable

Let's solve this riddle step by step.

We are given a series of equations using shapes:

1. ○ + ○ = 10
2. ○ × □ + □ = 12
3. ○ × □ − △ × ○ = ○
4. Find: △ = ?

Let’s assign variables:
- Let ○ = A
- Let □ = B
- Let △ = C

Now rewrite the equations:

Equation 1:

A + A = 10
→ 2A = 10
→ A = 5

So, ○ = 5

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Equation 2:

A × B + B = 12
Substitute A = 5:
5 × B + B = 12
→ 5B + B = 12
→ 6B = 12
→ B = 2

So, □ = 2

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Equation 3:

A × B − C × A = A
Substitute A = 5, B = 2:
5 × 2 − C × 5 = 5
→ 10 − 5C = 5
→ −5C = 5 − 10
→ −5C = −5
→ C = 1

So, △ = 1

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Final Answer:

△ = 1

✔ The triangle represents 1.

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Check all equations:

1. ○ + ○ = 5 + 5 = 10 ✔
2. ○ × □ + □ = 5 × 2 + 2 = 10 + 2 = 12 ✔
3. ○ × □ − △ × ○ = 5 × 2 − 1 × 5 = 10 − 5 = 5 = ○ ✔

All equations are satisfied!

✔ Answer: △ = 1