Question 22 of 48beginner🔧 ApplyShort Answer2 marks

Without finding the answer, can you tell the last digits of 18×518 \times 5, 23×523 \times 5, 32×532 \times 5, 50×550 \times 5.

Correct Answer

Pattern: When multiplying by 5:

  • Even numbers × 5 end in 0
  • Odd numbers × 5 end in 5

18×518 \times 5: Ends with 0 (18 is even)

23×523 \times 5: Ends with 5 (23 is odd)

32×532 \times 5: Ends with 0 (32 is even)

50×550 \times 5: Ends with 0 (50 is even)

Exercise: Seeing Patterns in Multiplication Tables | Q: 4 | (Page Page 18)
For More Understanding

Explanation

Using the pattern: even numbers × 5 end in 0, odd numbers × 5 end in 5. 18, 32, and 50 are even, so their products end in 0. 23 is odd, so its product ends in 5.

Solution Steps

  1. Identify the pattern: even numbers × 5 end in 0, odd numbers × 5 end in 5

  2. 18 is even, so 18×518 \times 5 ends with 0

  3. 23 is odd, so 23×523 \times 5 ends with 5

  4. 32 is even, so 32×532 \times 5 ends with 0

  5. 50 is even, so 50×550 \times 5 ends with 0

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