1.

Find the value of: 75 × 951. 70752. 71253. 72254. 72755. 7325

Answer» Correct Answer - Option 2 : 7125

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 = (9 + 1) × 7 = 70 (step 2 and 3)

_ 1 2 5

7 0 _ _

7 1 2 5 (Final answer)


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