Question

The last digit of the number obtained by multiplying the numbers 81 82 83 84 85 86 87 88 89 will be

Answer 1

Given :

• The numbers are 81, 82, 83, 84, 85, 86, 87, 88 and 89

To find :

• The last digit of the number obtained by multiplying the given numbers

Solution :

• The last digit of the product is obtained from the product of the last digits of the given numbers.

• The last digits are 1, 2, 3, 4, 5, 6, 7, 8 and 9.

• Their product is
• = 1 × 2 × 3 × 4 × 5 × 6 × 7 × 8 × 9
• = 362880

• We see that the last digit of the product is 0.

• Thus the last digit of the product of the given numbers is 0.

Answer :

• Required last digit is 0.