1.

45 × 651. 28752. 27253. 27754. 29255. 2975

Answer» Correct Answer - Option 4 : 2925

Concept used:-

Trick to multiply two numbers ending in 5 with difference of 20 between them.

Method:-

  • Write 125 at the end.
  • Add 1 to ten’s place of the bigger number.
  • Now multiply the increased digit with the ten’s digit of the smaller number.
  • Write the product so obtained on the left side of 125

Calculation:-

Let the product be A125

A = (6 + 1) × 4 = 28 (step 2 and 3)

_ 1 2 5

2 8 _ _

2 9 2 5 (Final answer)



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